[projects] Add project: Typst Companion (#32)

Co-authored-by: YDX-2147483647 <73375426+YDX-2147483647@users.noreply.github.com>

Author: github-actions[bot]

projects.yaml

@@ -935,3 +935,8 @@ projects:
     category: convert
     cargo_id: d2typ
     labels: [cli]
+
+  - name: Typst Companion
+    github_id: CFiggers/typst-companion
+    category: writing
+    labels: [extension]