✨ update readme to include links to other meeting notes

Author: ctcpip

README.md

@@ -1,3 +1,21 @@
 # TC39 Meeting Notes
 
-See [`meetings/`](https://github.com/tc39/notes/tree/main/meetings).
+This repository contains notes for TC39 plenary meetings, and are located in [meetings/](https://github.com/tc39/notes/tree/main/meetings)
+
+For other meeting notes, see below:
+
+| Meeting                                                      | Meeting Notes                                   | Meeting Agendas                            |
+| ------------------------------------------------------------ | ----------------------------------------------- | ------------------------------------------ |
+| TC39-TG1: General ECMAScript® language                       | [tc39/notes/meetings][tg1-notes]                | [tc39/agendas][tg1-agenda]                 |
+| TC39-TG2: ECMAScript® internationalization API specification | [tc39/ecma402/meetings][tg2-notes]              | [tc39/ecma402/projects][tg2-agenda]        |
+| TC39-TG3: Security                                           | [tc39/tg3/meetings][tg3-notes]                  | [tc39/tg3][tg3-agenda]                     |
+| Incubator Meetings                                           | [tc39/incubator-agendas/notes][incubator-notes] | [tc39/incubator-agendas][incubator-agenda] |
+
+[tg1-agenda]: https://github.com/tc39/agendas#tc39-meeting-agendas
+[tg2-agenda]: https://github.com/tc39/ecma402/projects/2
+[tg3-agenda]: https://github.com/tc39/tg3#agenda
+[incubator-agenda]: https://github.com/tc39/incubator-agendas#tc39-incubator-call-agendas
+[tg1-notes]: https://github.com/tc39/notes/tree/main/meetings
+[tg2-notes]: https://github.com/tc39/ecma402/tree/main/meetings
+[tg3-notes]: https://github.com/tc39/tg3/tree/main/meetings
+[incubator-notes]: https://github.com/tc39/incubator-agendas/tree/main/notes