ci: simplify workflow, remove coverage check

Replaced very_good_workflows with simpler custom workflow that:
- Runs flutter pub get
- Checks formatting
- Runs analysis
- Runs tests (without coverage requirements)
- Keeps spell check

Author: it5prasoon

.github/workflows/main.yaml

@@ -1,7 +1,7 @@
 name: aveditor
 
 concurrency:
-  group: $-$
+  group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 on:
@@ -13,18 +13,31 @@ on:
       - main
 
 jobs:
-  semantic-pull-request:
-    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/semantic_pull_request.yml@v1
-
   build:
-    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/flutter_package.yml@v1
-    with:
-      flutter_channel: stable
-      min_coverage: 0
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.38.7'
+          channel: 'stable'
+      
+      - name: Install Dependencies
+        run: flutter pub get
+      
+      - name: Format
+        run: dart format --set-exit-if-changed lib test
+      
+      - name: Analyze
+        run: flutter analyze lib test
+      
+      - name: Test
+        run: flutter test
 
   spell-check:
     uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/spell_check.yml@v1
     with:
       includes: |
         **/*.md
-      modified_files_only: false
+      modified_files_only: false