Added tsc agenda issue template

.github/ISSUE_TEMPLATE/tsc-agenda.yaml

@@ -0,0 +1,30 @@
+name: TSC Meeting Agenda Item
+description: Propose an agenda item to discuss at an upcoming TSC meeting
+title: "AGENDA TOPIC"
+labels: ["meeting-agenda"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Please set the issue title above to the agenda topic, and fill out the following details to have this added to a future TSC meeting agenda.
+  - type: textarea
+    id: details
+    attributes:
+      label: Please share any additional details on this topic
+    validations:
+      required: true
+  - type: textarea
+    id: tsc-action
+    attributes:
+      label: Detail what actions or feedback you would like from the TSC
+    validations:
+      required: true
+  - type: dropdown
+    id: topic-length
+    attributes:
+      label: How much time do you need for this topic?
+      description: Pick the option that is closest to the time you need for the topic.
+      multiple: false
+      options:
+        - 5 minutes or less
+        - 20 minutes