The change updates how clang-format is called in CI and locally, and adds prettier to the pre-commit hook. Proto files are now also formatted, while external files are excluded.
This change reverts the formatting applied to external files and adds formatting of proto files.
As clang-format will complain if a proto file is modified or moved, since the .clang-format file does not explicitly contain a section for proto files, the change has been included in this PR as well.
This commit introduces no functional changes but cleans up the
code and shrinks the surface area by removing dead and unused
code, leveraging std:: alternatives to hand-rolled code and
improving comments and documentation.
