fix: Address Gemini Code Assist review feedback

- Repository URL consistency: Updated all references to BeehiveInnovations/zen-mcp-server format
- Documentation clarity: Fixed misleading table headers and improved Docker configuration examples
- File conventions: Added missing final newlines to all files
- Configuration consistency: Clarified API key placeholder format in documentation

Addresses all points raised in PR #17 review by Gemini Code Assist.

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/documentation.yml

@@ -45,12 +45,12 @@ body:
       placeholder: |
         Change:
         ```
-        docker run ghcr.io/beehiveinnovations/gemini-mcp-server:latest
+        docker run ghcr.io/beehiveinnovations/zen-mcp-server:latest
         ```
         
         To:
         ```
-        docker run --pull=always ghcr.io/beehiveinnovations/gemini-mcp-server:latest
+        docker run --pull=always ghcr.io/beehiveinnovations/zen-mcp-server:latest
         ```
 
   - type: dropdown
@@ -64,4 +64,5 @@ body:
         - Advanced users (complex workflows)
         - All users
     validations:
-      required: true
+      required: true
+