feat(python): Add ty and select the Python language server (#121)

ty (`ty server`) joins basedpyright and Pyright as a Python language server (fallback, gets the project venv like the others, installable from Tools). Settings › Language Servers gets a Python language server picker: Automatic (first available), basedpyright, Pyright, ty or None, written through the per-server enabled settings (null globally / true in a project for enabled, false for disabled); other combinations show as Custom combination. Picker text is translated; the hint sits on its own line.

Claude-Session: https://claude.ai/code/session_01VUYsdXA2nkF5v6zsC93dpn
Co-authored-by: zzxzz12345 <[email protected]>

languages/python.toml

@@ -32,6 +32,14 @@ args = ["--stdio"]
 root-markers = ["pyproject.toml", "setup.py", "setup.cfg", "requirements.txt", "Pipfile", "pyrightconfig.json"]
 install-hint = "npm i -g pyright (or: pip install pyright)"
 
+[[language-servers]]
+name = "ty"
+fallback = true
+command = "ty"
+args = ["server"]
+root-markers = ["ty.toml", "pyproject.toml", "setup.py", "setup.cfg", "requirements.txt", "Pipfile"]
+install-hint = "uv tool install ty (or: pip install ty)"
+
 [debugger]
 adapter = "debugpy"
 command = "python3"