ci: add sourcegraph

Signed-off-by: Florian Lehner <dev@der-flo.net>

Author: florianl

.github/workflows/sourcegraph-lsif-indexing.yml

@@ -0,0 +1,21 @@
+name: "sourcegraph LSIF indexing"
+
+on:
+  push:
+    branches: [main]
+
+# Set default permissions as read only.
+permissions: read-all
+
+jobs:
+  lsif-go:
+    runs-on: ubuntu-latest
+    container: sourcegraph/lsif-go:latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - name: Generate LSIF data
+        run: lsif-go
+      - name: Upload LSIF data
+        # this will upload to Sourcegraph.com, you may need to substitute a different command.
+        # by default, we ignore failures to avoid disrupting CI pipelines with non-critical errors.
+        run: src lsif upload -github-token=${{ secrets.GITHUB_TOKEN }} -ignore-upload-failure