feat: add Gitea API test scripts

- create-gitea-token.sh: Create API token from username/password
- full-gitea-test.sh: Complete test creating milestone, issues, comments
- test-gitea.sh: Updated with correct scope names (all, read:*, write:*)

Test results:
✅ Token creation via Basic Auth
✅ Milestone creation (ID=42)
✅ 3 issues with checklists created
✅ 3 comments added with progress

Gitea API scopes: 'all' for full access, or granular like 'read:issue', 'write:issue'

scripts/test-gitea.sh

@@ -10,11 +10,11 @@ if [ -z "$GITEA_TOKEN" ]; then
     echo "❌ GITEA_TOKEN not set!"
     echo ""
     echo "To get your token:"
-    echo "1. Go to: https://git.softuniq.eu/user/settings/applications"
-    echo "2. Generate new token with 'repo' and 'issue' scopes"
+    echo "1. Run: ./scripts/create-gitea-token.sh <username> <password>"
+    echo "2. Or create manually at: https://git.softuniq.eu/user/settings/applications"
     echo "3. Export it: export GITEA_TOKEN=your_token_here"
     echo ""
-    echo "Example: export GITEA_TOKEN=abc123def456"
+    echo "Note: Use 'all' scope for full access"
     echo ""
     exit 1
 fi