Floatplane channel plugin for Jellyfin 10.10.x: browse, HLS proxy, cookie session, CI release

- IChannel: creators -> sub-channels -> video posts (public listing API, search mapped)
- IRequiresMediaInfoCallback -> signed proxy URLs; stream controller rewrites HLS so the
  AES-128 key is fetched server-side with the session cookie, segments stay on the CDN
- delivery/info cached per token lifetime and throttled (~2/min)
- config page: paste sails.sid + validate, extra creators, quality, search test
- scripts/package.sh -> plugin folder + zip + md5 + manifest.json; Gitea release workflow
- research docs, HAR analysis (HAR itself gitignored), install-pi5.sh

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

doc/research/reference-sources/fpdl_onDeviceCode.ts

@@ -0,0 +1,20 @@
+import type { OnDeviceCode } from "floatplane";
+import { args } from ".";
+import { requiredPrompts } from "../prompts/helpers";
+
+import open from "open";
+
+export const onDeviceCode: OnDeviceCode = async ({ verification_uri_complete, verification_uri }) => {
+	const verifyUri = verification_uri_complete ?? verification_uri;
+	const message = `Please login to Floatplane via ${verifyUri}`;
+	if (args.headless) {
+		console.log(message);
+	} else {
+		await open(verifyUri);
+		await requiredPrompts({
+			type: "confirm",
+			name: "login",
+			message,
+		});
+	}
+};