refactor: Rename package to gitea_mcp_remote and update configuration

Issue #19 - Foundation for Sprint 01: Core Architecture Correction

Changes:
- Renamed package directory: gitea_http_wrapper -> gitea_mcp_remote
- Updated config/settings.py:
  - Made gitea_repo optional (allow None)
  - Added mcp_auth_mode field (default: "optional")
  - Changed HTTP defaults: 0.0.0.0:8080 (was 127.0.0.1:8000)
  - Removed get_gitea_mcp_env() method (no longer needed)
- Updated all import paths throughout codebase
- Updated filtering/filter.py: Changed ValueError to warning when both
  enabled_tools and disabled_tools are specified
- Updated test files with new import paths
- Updated test_filtering.py to test warning instead of ValueError
- Updated pyproject.toml, pytest.ini, and README.md references

All modules preserved - only import paths and configuration updated.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -44,7 +44,7 @@ dev = [
 ]
 
 [project.scripts]
-gitea-http-wrapper = "gitea_http_wrapper.server:main"
+gitea-mcp-remote = "gitea_mcp_remote.server:main"
 
 [project.urls]
 Homepage = "https://github.com/lmiranda/gitea-mcp-remote"
@@ -55,7 +55,7 @@ where = ["src"]
 
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
-testpaths = ["src/gitea_http_wrapper/tests"]
+testpaths = ["src/gitea_mcp_remote/tests"]
 python_files = ["test_*.py"]
 python_classes = ["Test*"]
 python_functions = ["test_*"]