🔌 re-add plugin support

an_website/main.py

@@ -39,6 +39,7 @@
 from configparser import ConfigParser
 from functools import partial
 from hashlib import sha256
+from importlib.metadata import EntryPoints, entry_points
 from multiprocessing.process import _children  # type: ignore[attr-defined]
 from socket import socket
 from typing import Any, Final, TypedDict, TypeGuard, cast
@@ -147,6 +148,23 @@ def get_module_infos() -> str | tuple[ModuleInfo, ...]:
                 module_infos.extend(_module_infos)
                 loaded_modules.append(module_name)
 
+    plugin_entry_points: EntryPoints = entry_points(group='an_website-modules', name="get_module_infos")
+    for entry_point in plugin_entry_points:
+        if entry_point.module in IGNORED_MODULES:
+            continue
+        try:
+            module_infos.extend(entry_point.load()())
+        except Exception as exc:
+            raise ValueError(f"Failed to load entry point {entry_point}, add {entry_point.module!r} to IGNORED_MODULES") from exc
+        else:
+            loaded_modules.append(entry_point.module)
+            LOGGER.info(
+                (
+                    "Found module_infos in external module %r"
+                ),
+                entry_point.module,
+            )
+
     if len(errors) > 0:
         if sys.flags.dev_mode:
             # exit to make sure it gets fixed