feat: setup connection to notion db (#21)

## what

- following the [Notion x GitHub Action GHA setup
instructions](https://github.com/marketplace/actions/notion-x-github-action),
let's connect this repo's issues and the [Masterpointio Github Issues
page](https://www.notion.so/masterpoint/17b859758a56806a9000ff4bc2bde8b4?v=17b859758a56817ca64c000c1b6b471d)

## references
- let's see if this expression, `closes #INT-52`, closes the issue
[INT-52](https://www.notion.so/masterpoint/Create-automation-for-Masterpoint-GH-issues-creating-Notion-tickets-auto-assign-to-a-team-member--c51a716979fe44f7a0163a1c3353f9ef)


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **New Features**
- Introduced an automated integration that syncs issue updates with
Notion. This enhancement triggers on various issue actions—such as
creation, updates, and status changes—ensuring streamlined tracking and
improved workflow management.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Matt Gowie <matt@masterpoint.io>

Author: westonplatter

.github/workflows/notion-sync.yaml

@@ -0,0 +1,30 @@
+name: Notion Sync
+
+permissions:
+  issues: read
+
+on:
+  workflow_dispatch:
+  issues:
+    types:
+      - opened
+      - edited
+      - labeled
+      - unlabeled
+      - assigned
+      - unassigned
+      - milestoned
+      - demilestoned
+      - reopened
+      - closed
+
+jobs:
+  notion_job:
+    runs-on: ubuntu-latest
+    name: Add GitHub Issues to Notion
+    steps:
+      - name: Add GitHub Issues to Notion
+        uses: tryfabric/notion-github-action@10c6b128faeb9a1f16efc65a0b388b7595047e62
+        with:
+          notion-token: ${{ secrets.GH_ISSUES_NOTION_TOKEN }}
+          notion-db: ${{ secrets.GH_ISSUES_DB_ID }}