rewrite(matrix): use matrix-bot-sdk as base to enable e2ee encryption, strictly follow location + typing + group concepts, fix room bugs

src/plugin-sdk/index.ts

@@ -104,6 +104,8 @@ export {
   resolveMentionGatingWithBypass,
 } from "../channels/mention-gating.js";
 export { resolveChannelMediaMaxBytes } from "../channels/plugins/media-limits.js";
+export type { NormalizedLocation } from "../channels/location.js";
+export { formatLocationText, toLocationContext } from "../channels/location.js";
 export {
   resolveDiscordGroupRequireMention,
   resolveIMessageGroupRequireMention,