corporate shilling: add LSIF upload action

Author: Strum355

.github/workflows/lsif.yml

@@ -0,0 +1,14 @@
+name: LSIF
+on:
+  - push
+jobs:
+  index:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Generate LSIF data
+        uses: sourcegraph/lsif-rust-action@main
+      - name: Upload LSIF data
+        uses: sourcegraph/lsif-upload-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}