fix: refactor pr template path input to pre-filled Select instead of TextBox

[ndom91]

☕️ Reasoning

• Based on some customer feedback, it seemed smarter to just check the few places where each git host (GitHub in this instance), allows PR Templates to be and show those options in a dropdown. Definitely feels like a much nicer UX and is much less error prone to a user typing in a path themselves.

🧢 Changes

• Add tauri rust cmd to read the ${project.path}/.github/ dir recursively
  • Then check those contents against the predefined filenames / directories which constitute valid PR templates
  • If found, add them to a vec and return that to the FE
• Show only valid available template options in a <Select />
• Modified the saving of these options from global Persisted variables to being saved on a project level in the projects.json
• Instead of passing the PR Template settings into the githost at initialisation, they're passed in as arguments to the createPr() fn now. This allows reading the current setting value at time of btn click (better) and logically seems more appropriate this way.

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Name	Status	Preview	Comments	Updated (UTC)
gitbutler-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 13, 2024 10:26am

[Caleb-T-Owens]

Talking to Nico, we've acknowledged that a path could back out of the directory using ../../../, but due to the size of the PR, we'd rather merge in now, and improve the security in a follow up PR.

[estib-vega]

👍