Initial bridge: Discord <-> Fluxer channel relay via webhooks

- discord.py + fluxer.py bots run side-by-side in one asyncio process
- messages relay through per-channel incoming webhooks with the original
  author's name and avatar (suffixed '(Discord)' / '(Fluxer)')
- loop protection: bot-authored and webhook-authored messages are ignored
- attachments re-uploaded natively both directions (8 MB cap)
- emoji mirroring: on-demand upload into the receiving guild with LRU
  eviction of bridge-created emojis only; pre-existing emojis untouched;
  to-Discord direction opt-in (50-slot default guild cap)

pyproject.toml

@@ -0,0 +1,13 @@
+[project]
+name = "itako"
+version = "0.1.0"
+description = "Discord <-> Fluxer.app channel bridge"
+requires-python = ">=3.11"
+dependencies = [
+    "discord-py>=2.4",
+    "fluxer-py",
+    "python-dotenv>=1.0",
+]
+
+[tool.uv.sources]
+fluxer-py = { git = "https://github.com/Fluxer-py/fluxer.py" }