Support multiple PR templates

[brettcannon]

Type: Feature Request

E.g., the https://github.com/python/peps/ repo has multiple PR templates to choose from depending on the purpose of the PR. It would be nice if a quick pick came up asking which template to use before opening up the UI to fill in the description.

(Apologies if this is a dupe; the issue reporter hit a GH query limit while I was typing in my title.)

Extension version: 0.101.2024110404
VS Code version: Code - Insiders 1.96.0-insider (231d37338a58ff22c223a7ed7d4c1e7142c513d2, 2024-11-04T14:19:41.196Z)
OS version: Windows_NT x64 10.0.26100
Modes:
Remote OS version: Linux x64 5.15.153.1-microsoft-standard-WSL2