feat: move session sharing and collab rooms into a plugin (B12)

plugins/session-sharing/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "extends": "@termix/plugin-sdk/tsconfig.plugin.json",
+  "include": ["src/**/*.ts", "src/**/*.tsx", "tests/**/*.ts", "tests/**/*.tsx"]
+}