chore: added meeting agenda template

Author: ovflowd

.github/ISSUE_TEMPLATE/meeting-agenda.md

@@ -0,0 +1,51 @@
+## Date/Time
+
+| Timezone | Date/Time |
+|----------|-----------|
+<%= [
+  'America/Los_Angeles',
+  'America/Denver',
+  'America/Chicago',
+  'America/New_York',
+  'Europe/London',
+  'Europe/Amsterdam',
+  'Europe/Moscow',
+  'Asia/Kolkata',
+  'Asia/Shanghai',
+  'Asia/Tokyo',
+  'Australia/Sydney'
+].map((zone) => {
+  return `| ${zone} | ${date.setZone(zone).toFormat('EEE dd-MMM-yyyy HH:mm (hh:mm a)')} |`
+}).join('\n') %>
+
+Or in your local time:
+* https://www.timeanddate.com/worldclock/?iso=<%= date.toFormat("yyyy-MM-dd'T'HH:mm:ss") %>
+
+## Agenda
+
+Extracted from **<%= agendaLabel %>** labelled issues and pull requests from **<%= owner %>/<%= repo %>** prior to the meeting.
+
+<%= agendaIssues.map((i) => {
+  return `* ${i.html_url}`
+}).join('\n') %>
+
+## Invited
+
+- Webpack TSC (@webpack/tsc)
+
+### Observers/Guests
+
+This meeting is open for anyone who wants to attend. Reminder to follow our [Code of Conduct](https://github.com/webpack/webpack/blob/main/CODE_OF_CONDUCT.md).
+
+### Joining the meeting
+
+* Join [Webpack's Discord server](https://discord.gg/5sxFZPdx2k) then the #tsc channel
+
+---
+
+Please use the following emoji reactions in this post to indicate your
+availability.
+
+- 👍 - Attending
+- 👎 - Not attending
+- 😕 - Not sure yet