Clean up .gitignore

[Gold856]

Description

We have many .gitignores spread out across the different subprojects. However, there seems to be either a lot of redundant or unnecessary files ignored. It's really confusing to figure out what's ignored and where it's being ignored from, so the .gitignore files have been consolidated into the root .gitignore, with some modifications made when necessary.

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with settings back to v2024.3.1
• If this PR touches pipeline settings or anything related to data exchange, the frontend typing is updated
• If this PR addresses a bug, a regression test for it is added

[samfreund]

Why are there a bunch of formatting changes?

[Gold856]

Some of the files fell under the previous .gitignore. I believe that stopped wpiformat from correctly adding the license header. This is what they're supposed to look like.

[samfreund]

Some of the files fell under the previous .gitignore. I believe that stopped wpiformat from correctly adding the license header. This is what they're supposed to look like.

So they were in the repo, then they got added to the gitignore? Just trying to figure out the timeline here.

[Gold856]

Something like that? I'm honestly not going to question it too much.