Add documentation for ck_tile::array<T,N>

[AviralGoelAMD]

Proposed changes

This PR adds doxygen generated documentation for the ck_tile::array<T,N> container.

Checklist

Please put an x into the boxes that apply. You can also fill these out after creating the PR. If you're not sure, please don't hesitate to ask.

• I have added tests relevant to the introduced functionality, and the unit tests are passing locally
• I have added the test to REGRESSION_TESTS list defined at the top of CMakeLists.txt in tests/CMakeLists.txt, IF the test takes more than 30 seconds to run.
• I have added inline documentation which enables the maintainers with understanding the motivation
• I have removed the stale documentation which is no longer relevant after this pull request
• (If this change is user-facing) I have added release notes which provide the end users with a brief summary of the improvement from this pull request
• I have run clang-format on all changed files
• Any dependent changes have been merged

Discussion

If this is a relatively large or complex change, feel free to start a discussion by explaining why you chose the solution you did and what alternatives you considered

[aosewski]

Just few spellings.

[spolifroni-amd]

minor changes

[AviralGoelAMD]

reverted documentation to use the term "punning" instead of "pruning".

[AviralGoelAMD]

fixed terms

[ThomasNing]

LGTM

Addressed the comments