ci: support spellcheck of markdown and rst files

[baprusty]

• This action will auto check spellings in .md and .rst files in the repo
• wordlist.txt consists of all the words that are added to dictionary and
  should be ignored while spell checking

Closes: #286
Signed-off-by: Badrikesh Prusty badrikesh.prusty@siemens.com

[baprusty]

Hi @chombourger, For the task: #286 (ci: spell check markdown documents)
I tried the following ci job: rojopolis/spellcheck-github-actions (https://github.com/rojopolis/spellcheck-github-actions)
Currently I just added spellchecks for some .md files, will check with rst files in docs if required.

Kindly check if the following approach okay for this task, or some other methods we should check for this ?

[chombourger]

yes this does look fine, thanks!

[baprusty]

Spell check logs:

 Using pyspelling on configuration outlined in >.github/spellcheck_config.yml<
Checking files matching specified outlined in >.github/spellcheck_config.yml<
----------------------------------------------------------------
Using aspell to spellcheck Markdown
Running Task: Markdown...
Compiling Dictionary...
> Processing: README.md
> Processing: CONTRIBUTING.md
> Processing: MAINTAINERS.md
> Processing: docs/install.rst
> Processing: docs/FAQ.rst
> Processing: docs/usage.rst
> Processing: docs/build.rst
> Processing: docs/config.rst
> Processing: docs/intro.rst
> Processing: docs/dev.rst
> Processing: docs/index.rst
> Processing: docs/fixtures.rst
> Processing: docs/integration.rst

Spelling check passed :)

Spellcheck actions log: https://github.com/siemens/mtda/actions/runs/6632646598/job/18018773459

[baprusty]

@chombourger Please review
Updated the PR, this will perform spellcheck action for all .md files and docs/*.rst files

[chombourger]

The following files have no copyright and licensing information:
* .github/spellcheck_config.yml
* .github/wordlist.txt

we will need to add copyright/license info to the above files

[baprusty]

The following files have no copyright and licensing information:
* .github/spellcheck_config.yml
* .github/wordlist.txt

we will need to add copyright/license info to the above files

Added license info for these files