Implement register_listener and unregister_listener functionality

.github/workflows/check.yml

@@ -1,20 +1,20 @@
-name: Rust Project CI
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-jobs:
-  build_and_test:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Build
-        run: cargo build --verbose
-
-      - name: Run tests
+name: Rust Project CI
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build_and_test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build
+        run: cargo build --verbose
+
+      - name: Run tests
         run: cargo test --verbose

.gitignore

@@ -1 +1 @@
-/target
+/target