Update for Doxygen 1.9.5 (#119) ...

* Update for Doxygen 1.9.5

* Also update doxygen version in docs.yaml

* Also fix Doxygen version in basic_checks.yaml

Fix all Doxygen errors and make any future errors fatal (#118) ...

* Start working on fixing doxygen warnings

* Upgrade doxyfile to Doxygen 1.9.1

* Clean up some unmatched groups and add some exclusions

* Fix docs for rtos::ThisThread not showing up

* Fix up KV store docs

* Fix incorrect @files, some more incorrect groups

* Fix lots of broken links

* Start fixing mbedtls groups

* Fix more mbedtls docs

* Fix remaining mbedtls files with missing or incorrect grouping

* Fix a huge amount of PSA docs errors

* Fix a few more mbedtls docs errors

* Fix __cplusplus not defined for docs, clean up call in callback typedef, fix some docs errors

* Fix some broken doc links in HAL headers

* Fix more PSA doc errors

* Fix some doxygen errors in networking code

* Fix lots of network related doc errors

* Try and fix some CI failures

* Use Doxygen Action instead of doxygen in Mbed container to get the right version

* Try removing docs check

* Add first part of doxygen action

* Add next part of doxygen action

* Fix yaml syntax error

* Add in license check fix

* Try using verbose scancode

* Fix some more docs issues, workaround scancode-toolkit#3179

* Clean up the LoRaRadio get_state() function on each implementation.  Also fix some other compile and doc errors.

* Fix all remaining doxygen errors

* Fix escaping, for realsies this time

* Remove Doxygen unsupported config options, fix some more get_status() declarations

* Fix some UNITTESTS build errors

* Fix one more compile error

* Another unittest error

Update readme to show that this is Mbed CE, and update templates to show that this is no longer an automated system

Remove the legacy Mbed CLI 1 tools!

travis ci migration to github action

Fix 'LICENSE' file 404 link error

README link to license guide 404s ...

This updates the link

Remove extra post-waffle cruft that was left behind

readme: remove waffle as not supported soon ...

Fixes #10176

Add articles to README.md ...

Include articles for clarity.

readme: fix space and . in license

readme: license file reference fix

license: add license file containing folders with non apache license

readme: storage license under one folder

readme: license update ...

Fix licenses based on latest Fossology scan. Using -style licenses for specific type licenses
Add paths to the readme.

readme: add list of licenses - not Apache 2.0 ...

Name all folders containing different liceses. Any new file not Apache 2.0 should
be captured here.

Edits in README.md ...

Remove unnecessary commas, and standardize heading capitalization.

Commas and other small editorial changes

readme: fix apache license

Readme: add license guide doc page

readme: add note about 3rd party code licenses

readme: add license section

Add GH link to README.md ...

Add link for contributing to docs, as well.

Add link to README.md ...

Add link to published documentation.

Simple typo fix in the README.md

Copy edit README.md ...

Make minor copy edits for comma use and consistent capitalization across documents.

Readme updates for style and branding ...

Add a logo and reformat the readme layout. Update use of Mbed to
align with Arm branding guidelines.

Post coverage details on coveralls and link to them in readme

Edit Readme and add Travis Badges

README: Minor interpunction fix