feat: make uvicorn event loop configurable via OPEN_TERMINAL_UVICORN_LOOP

Defaults to 'auto' (uvicorn's default). Users hitting segfaults on
Python 3.12 can set OPEN_TERMINAL_UVICORN_LOOP=asyncio to bypass uvloop.

Refs #37

Author: tjbck

open_terminal/cli.py

@@ -98,7 +98,8 @@ def run(
         click.echo("=" * 60)
     click.echo()
 
-    uvicorn.run("open_terminal.main:app", host=host, port=port, loop="asyncio")
+    from open_terminal.env import UVICORN_LOOP
+    uvicorn.run("open_terminal.main:app", host=host, port=port, loop=UVICORN_LOOP)
 
 
 @main.command()

open_terminal/env.py

@@ -93,3 +93,7 @@ def _resolve_file_env(var: str, default: str = "") -> str:
     "OPEN_TERMINAL_ENABLE_NOTEBOOKS",
     str(config.get("enable_notebooks", True)),
 ).lower() not in ("false", "0", "no")
+UVICORN_LOOP = os.environ.get(
+    "OPEN_TERMINAL_UVICORN_LOOP",
+    config.get("uvicorn_loop", "auto"),
+)