clang-format entire codebase

[drbenmorgan]

Another maintenance commit following the creation of the AdePT library structure, simply applying the current clang-format settings to all source code. Though it's a large commit, we can use Git's blame.ignoreRevsFile functionality:

• https://docs.github.com/en/repositories/working-with-files/using-files/viewing-a-file#ignore-commits-in-the-blame-view
• https://michaelheap.com/git-ignore-rev/

and locally using:

git config --global blame.ignoreRevsFile .git-blame-ignore-revs
git config --global blame.markIgnoredLines true
git config --global blame.markUnblamableLines true

to avoid later confusion when looking at changes. The needed .git-blame-ignore-revs file is best added in a new PR after this is merged as the commit hash to ignore may not be know until then.

This can be used in future when/if we change the style.

[phsft-bot]

Can one of the admins verify this patch?