feat: a package manager

[Jan0660]

GitHub repositories would be the default way to add a package by:

Installing experience TBD:

Install-Package Jan0660/rcaron-omp

Packages would just be git repos, GitHub by default.

Would be able to install:

• a specific version
  • would not auto-update
  • when updating all packages, would remind that the package does not auto-update
• latest stable(no version suffix)
• latest prerelease(with version suffix)
• latest commit(be able to select branch)
  • check if GitHub CI successful by default

---

• packages would use semantic versioning
  • if major version increments, a normal package updating would not update
• have a global(user) package store, when a package is installed into a project, it would symlink there

Ideas:

• package manifest would state for what rcaron version it is, if it is breaking, then something something have like a command to check all user's packages are valid with the next version
  • this would be a little yucky since packages would have to increment their major version because of RCaron itself
  • user would be able to wait before updating to a new major RCaron version for all their packages to be compatible with it (better than the alternative of updating and packages being inexplicably broken though)
  • would have to use a separate breaking version property or shift version numbers to 0.MAJOR.MINOR.PATCH
• could theoretically also have a "known list" in the future so one could install rcaron-omp instead of Jan0660/rcaron-omp

Other:

• can install from own git host/url
• can install into a project