Implement Chat Summaries plugin

Replace the sample plugin with an AI chat summarizer that renders its
output as a native RichMessage injected into the chat.

Summarization pipeline:
- Fetch chat/topic history via paginated TL requests.
- Send a system prompt, the user's instructions and an anonymized JSON
  transcript as three separate roles. Only message text and attachment
  names leave the device; senders and message ids are replaced by
  indices, and out-of-range reply parents are included with negative ids
  so replies keep their context.
- Stream the response over SSE, reading reasoning from reasoning_content,
  reasoning or inline <think> tags.
- Substitute the model's {userN}/{msgN} placeholders back into real names
  and deep links. Placeholders are used instead of Markdown links because
  a half-streamed link renders as broken literal text.

Rendering:
- Compile Markdown into TL_iv page blocks (headings, lists, quotes, code,
  dividers, inline styles) since the app's own converter works off
  Android Spanned spans rather than Markdown source.
- Show progress stages immediately on click, animate reasoning while it
  streams, then collapse it into a tappable details block.
- Attribute the card to a client-side mock sender and insert it directly
  after the newest analyzed message, scrolling it into view.

Persistence:
- Store summaries in SQLite keyed by (dialog, topic, anchor) and
  re-inject them when the chat is reopened.

Also add tools/release.py and a Gitea workflow that builds, verifies and
publishes dist/<id>.plugin to the Releases tab, and extend
tools/verify_bundle.py to 104 offline checks covering the transcript,
streaming, rendering, injection and storage behaviour.

plugin.json

@@ -1,11 +1,11 @@
 {
-  "id": "hello_bundle",
-  "name": "Hello Bundle",
-  "description": "Multi-file exteraGram plugin built by tools/bundle.py",
-  "author": "@yourhandle",
+  "id": "chat_summaries",
+  "name": "Chat Summaries",
+  "description": "Summarize the last N messages (with offset) in any chat, group, channel, or topic using AI.",
+  "author": "@lyuksovannyy",
   "version": "1.0.0",
   "icon": "exteraPlugins/1",
   "app_version": ">=12.5.1",
   "sdk_version": ">=1.4.4.3",
-  "requirements": []
+  "requirements": ["requests", "debugpy"]
 }