Remove incorrect standalone MCP implementation

This commit removes the incorrectly structured standalone MCP server that was built without understanding the distinction between standalone and HTTP transport modes. These files will be replaced with proper HTTP transport wrapper components.

Removed:
- src/gitea_mcp/ directory (standalone server implementation)
- tests/ directory (tests for standalone implementation)

This clears the way for implementing the correct HTTP-wrapped architecture.

Closes #9

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

tests/conftest.py

@@ -1,103 +0,0 @@
-"""Shared pytest fixtures for Gitea MCP tests."""
-
-import pytest
-from unittest.mock import AsyncMock, MagicMock
-from gitea_mcp.auth import AuthConfig
-from gitea_mcp.client import GiteaClient
-
-
-@pytest.fixture
-def mock_config(monkeypatch):
-    """Create mock authentication config.
-
-    This fixture sets up test environment variables and returns
-    a configured AuthConfig instance for testing.
-    """
-    monkeypatch.setenv("GITEA_API_URL", "http://gitea.example.com/api/v1")
-    monkeypatch.setenv("GITEA_API_TOKEN", "test_token_123")
-    return AuthConfig()
-
-
-@pytest.fixture
-def mock_client(mock_config):
-    """Create a mock GiteaClient instance.
-
-    Returns a GiteaClient with mocked HTTP methods that don't make
-    real API calls. Use this for testing tool handlers.
-    """
-    client = GiteaClient(mock_config, timeout=10.0)
-
-    # Mock the internal HTTP client methods
-    client.get = AsyncMock()
-    client.post = AsyncMock()
-    client.patch = AsyncMock()
-    client.delete = AsyncMock()
-
-    # Mock context manager
-    client.__aenter__ = AsyncMock(return_value=client)
-    client.__aexit__ = AsyncMock(return_value=None)
-
-    return client
-
-
-@pytest.fixture
-def sample_issue():
-    """Sample issue data for testing.
-
-    Returns a dict representing a typical Gitea issue response.
-    """
-    return {
-        "id": 1,
-        "number": 42,
-        "title": "Test Issue",
-        "body": "This is a test issue",
-        "state": "open",
-        "created_at": "2024-01-15T10:00:00Z",
-        "updated_at": "2024-01-15T12:00:00Z",
-        "html_url": "http://gitea.example.com/test/repo/issues/42",
-        "labels": [
-            {"id": 1, "name": "bug", "color": "ff0000"},
-            {"id": 2, "name": "priority-high", "color": "ff9900"},
-        ],
-        "milestone": {
-            "id": 10,
-            "title": "v1.0",
-            "state": "open",
-        },
-        "assignees": [
-            {"id": 100, "login": "testuser"},
-        ],
-    }
-
-
-@pytest.fixture
-def sample_label():
-    """Sample label data for testing.
-
-    Returns a dict representing a typical Gitea label response.
-    """
-    return {
-        "id": 1,
-        "name": "bug",
-        "color": "ff0000",
-        "description": "Something isn't working",
-    }
-
-
-@pytest.fixture
-def sample_milestone():
-    """Sample milestone data for testing.
-
-    Returns a dict representing a typical Gitea milestone response.
-    """
-    return {
-        "id": 10,
-        "title": "v1.0",
-        "description": "First major release",
-        "state": "open",
-        "open_issues": 5,
-        "closed_issues": 15,
-        "created_at": "2024-01-01T00:00:00Z",
-        "updated_at": "2024-01-15T12:00:00Z",
-        "due_on": "2024-12-31T23:59:59Z",
-    }