Add CI checks against todo comments without issues

Author: chitoyuu

.github/workflows/minimal-ci.yml

@@ -52,6 +52,15 @@ jobs:
       - name: "Check clippy"
         run: cargo clippy --workspace --features ${GDRUST_FEATURES} -- -D clippy::style -D clippy::complexity -D clippy::perf -D clippy::dbg_macro -D clippy::todo -D clippy::unimplemented
 
+  check-todo:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: "Install ripgrep"
+        run: "sudo apt-get update && sudo apt-get install ripgrep"
+      - name: "Look for TODO comments without issue numbers attached to them"
+        run: "! rg -iTh --pcre2 '(?<!clippy::)(TODO|FIXME)(?!!\\(\\)|\\((#|(\\w+/)+)\\d+\\))'""
+
   unit-test:
     runs-on: ubuntu-latest
     steps: