Add support for uploading debug symbols

[GeckoEidechse]

As far as I can tell from the README, only uploading JavaScript source maps is supported. This means that for a native project (C, C++, Rust, etc) one has to additionally still upload debug information to sentry manually using sentry-cli.

If support for uploading the debug symbols were to be added to this action it would simplify the release process for theses types of actions by a lot.

As far as I know, this is platform dependent, e.g. for Windows one can upload the .pdb, for Linux/MacOS one has to build the binary with debug symbols, upload that binary, and then strip them again from binary for final release which might complicate things.

But at least for Windows adding this functionality should be relatively straight forward ^^