fix(docs): corrects various typos in project documentation

Update Mbed version block

Merge pull request #14507 from saheerb/master ...

make target list for applications in examples_cmake.json consistent with examples.json

Merge pull request #14465 from harmut01/baremetal_maxim ...

Maxim: Add bare metal support to targets

Merge pull request #14480 from jeromecoutant/PR_STM32_STANDARD ...

STM32: Standard Pin Names

Merge pull request #14463 from mikaleppanen/start_wisun_if ...

Wisun: Add new start methods to Wi-SUN BR with WisunInterface parameter and deprecated the old ones

Merge pull request #14529 from LDong-Arm/cmake_MULADDC ...

CMake: Fix Mbed TLS compilation on Cortex-M0/0+/1/M23

Merge pull request #14516 from 0xc0170/fix-cmake-project-name ...

CMake: remove MBED_PATH and use <PROJECT-NAME>_SOURCE_DIR/MODULE_PATH instead

disable test for example-device-key

update cmake_examples to latest CI passing list

CMake: Fix Mbed TLS compilation for Cortex-M0/0+/1/M23 ...

Due to a known issue in Mbed TLS's architecture determination
(ARMmbed/mbedtls#1077), we get the error

    error: inline assembly requires more registers than available

when compiling `bignum.c` for Cortex-M0/0+/1/M23 which do not have
the macro `__thumb2__` set by the compiler.

The workaround is to define the macro `MULADDC_CANNOT_USE_R7` which
is already defined by Mbed CLI 1 but missing in our CMake support.

Fixes ARMmbed/mbed-os-example-lorawan#220

Merge pull request #14546 from rwalton-arm/dev/rwalton-arm/fix-connectivity-driver ...

CMake: Fix mbed-802.15.4-rf driver

Merge pull request #14483 from LDong-Arm/tdbstore_whitebox_low_ram ...

Improve HeapBlockDevice, TDBStore and tests

Merge pull request #14541 from LDong-Arm/crash-reporting-baud ...

Increase baud rate of mbed-os-example-crash-reporting to 115200

Merge pull request #14469 from jeromecoutant/PR_FLASH_PROGRAM ...

STM32: remove critical sections in flash_program_page

TDBStore Whitebox tests: fix memory check ...

Each block of HeapBlockDevice is only allocated from the heap when
that block is programmed. And erasing a block frees the associated
buffer.

To decide if there is enough heap to run the TDBStore Whitebox tests,
we need to perform a trial program() instead of erase().

TDBStore: call `BlockDevice::erase()` regarless of erase value ...

From the documentations of `BlockDevice::get_erase_value()`:

    -1 if you can't rely on the value of the erased storage

and `BlockDevice::program()`:

    The blocks must have been erased prior to being programmed

So, `BlockDevice::erase()` should always be called regardless of
erase value.

TDBStore: optimize erase algorithms ...

Currently `TDBStore::offset_in_erase_unit()` and
`TDBStore::check_erase_before_write()` loop through erase units
one-by-one, until the entire range is covered. This is very inefficient
when the erase size is tiny, e.g. one-byte on a non-flash device for
which we use program as erase.

This commit reworks the algorithms, based on the fact that a block
device can erase or program as many units as needed in one go.

FileSystemStore unit test: remove erased_set_get test ...

The "erased_set_get" test case deinits `FileSystemStore`, erases the
block device, and reinits `FileSystemStore`. This of course fails,
because `BlockDevice::erase()` removes all stored data including the
format of the `FileSystem` (middle layer), unless the particular type
of block device has a no-op erase implementation.

Note: Previously `HeapBlockDevice::erase()` was essentially a no-op
so this test case did not fail. We recently added the freeing of heap
memory and it uncovered the problem.

HeapBlockDevice::erase(): free up heap memory ...

`HeapBlockDevice::erase()` previously performed a range and alignment
check only. This commit adds freeing of heap memory.

HeapBlockDevice: allocate with std::nothrow ...

Mbed OS does not enable C++ exceptions, so we should call `new` with
`std::nothrow` which returns a C-style NULL pointer when allocation
fails to allow error handling.

For consistency of style within the same file, this commit also
replaces `malloc()` and `free()` to `new (std::nothrow)` and `delete`.

Merge pull request #14486 from jeromecoutant/PR_CLI2_BLE ...

CMake COMPONENT_BlueNRG_MS: fix mbed-ble

Merge pull request #14545 from Patater/deprecate-bootloader-example ...

examples: Deprecate mbed-os-example-bootloader

CMake: set CMAKE_MODULE_PATH in the Mbed OS CMakelists.txt ...

Update CMAKE_MODULE_PATH at once place.

Note, we update also CMAKE_MODULE_PATH in app.cmake. This is temporary until we get a proper way to include
Mbed Os (removing app.cmake need to be included by an application).

CMake: add mbed_ prefix to our CMake files ...

To avoid conflicts as we expose our CMake list files via CMAKE_MODULE_PATH. Some files already include it, this
aligns the rest of files.

I leave app.cmake as it is - it's user facing and it would be breaking change. We can clean this one for the next major version.

CMake: fix for CMAKE_CURRENT_LIST_DIR in functions ...

CMAKE_CURRENT_LIST_DIR behaves differently in functions. We store it in the CMakeLists itself, so anyone
calling a function would get the actual list dir where the scripts are.

To illustrate: if I call a function from src/CMakelists.txt, function located in src/scripts, `CMAKE_CURRENT_LIST_DIR` in the function would point
to the src/ folder but not to src/scripts.

CMake app: add our cmake folder to CMAKE_MODULE_PATH ...

All files within tools/cmake can now include within tools/cmake. We do not expose
internal folders like core/profiles/toolchains.
They should be included via toolchain file (mbed_toolchain in our case).

CMake tools: use CMAKE_CURRENT_LIST_DIR instead of MBED_PATH ...

Excluding greentea tests, they will be fixed separately (more work needed).

CMake platform: remove MBED_PATH, use standard variables ...

As we still use target labels, TFM is not visible to CMake. Protect include of their scripts with the same mechanism.

CMake targets: remove MBED_PATH, use stadard variables ...

- list files included via module path
- <project-name>_SOURCE_DIR for sources that are out of the current processed CMake
- CMAKE_CURRENT_LIST_DIR for listfiles