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/fpts_README.md

@@ -0,0 +1,67 @@
+# Unofficial Floatplane API
+
+This library is not in any way related to LMG or Floatplane Media Inc.
+
+Features/Endpoints are added as needed so if something is missing please make a [Issue](https://github.com/Inrixia/floatplaneAPI.ts/issues/new) or fork, add it yourself and [Pull Request](https://github.com/Inrixia/floatplaneAPI.ts/pulls)
+
+### Install
+
+`$ npm install floatplane`
+
+### Types & Docs
+
+This library uses & collaborates with the **[Floatplane API Specification](https://github.com/Jman012/FloatplaneAPI)** which has full **[documentation](https://jamamp.github.io/FloatplaneAPIDocs/)** for most Floatplane endpoints including ones this library has not yet implemented.
+
+### Example Usage
+
+```ts
+import { Floatplane, type AuthToken, OnDeviceCode } from 'floatplane';
+
+class AuthTokenStore {
+    authToken?: AuthToken;
+}
+
+const onDeviceCode: OnDeviceCode = async ({ verification_uri_complete, verification_uri }) => {
+    const verifyUri = verification_uri_complete ?? verification_uri;
+    console.log(`Please login to Floatplane via ${verifyUri}`);
+};
+
+const authTokenStore = new AuthTokenStore();
+
+const floatplane = new Floatplane({
+	authConfig: {
+		clientId: "example-client",	// Has to be registered on FloatPlane
+		authToken: authTokenStore.authToken,
+		onAuthToken: (authToken) => {authTokenStore.authToken = authToken},
+		onDeviceCode,
+	},
+	userAgent: `ExampleApp`, // Reference: https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/User-Agent
+});
+
+// Fetch User subscriptions
+const subs = await floatplane.user.subscriptions();
+
+// 20 Latest videos from first subscription
+const videos = await floatplane.creator.blogPosts(subs[0].creator, { hasVideo: true });
+
+// Fetch all videos asynchronously
+for await (const video of floatplane.creator.blogPostsIterable(subs[0].creator, { hasVideo: true })) {
+	console.log(video);
+}
+```
+
+Take a look at https://github.com/Inrixia/Floatplane-Downloader/blob/055e21e42c0af89a68cdf2f58a195cc81ad07ddf/src/lib/helpers/index.ts#L49-L58 for a reference implementation.
+
+Individual classes can also be imported seperately:
+
+```ts
+import { Auth } from "floatplane/auth";
+```
+
+<br/>
+
+## Projects
+
+The following projects use this library:
+
+### [Floatplane Downloader](https://github.com/Inrixia/Floatplane-Downloader)