feat: Remove old server and create MCP base server structure

- Delete old subprocess-based server.py
- Create new server_http.py with base structure for MCP Streamable HTTP protocol
- Update __init__.py to import from server_http
- Health check endpoint in place
- Middleware integration ready for MCP endpoints

Issue #24 will add the actual MCP protocol endpoints.

Closes #23

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

src/gitea_mcp_remote/server_http.py

@@ -0,0 +1,69 @@
+"""
+Gitea MCP Remote — HTTP server with MCP Streamable HTTP protocol.
+
+This module imports tool definitions from the marketplace gitea-mcp-server
+package and serves them over HTTP with authentication.
+"""
+
+import logging
+import uvicorn
+from starlette.applications import Starlette
+from starlette.responses import JSONResponse
+from starlette.routing import Route
+
+from gitea_mcp_remote.config import load_settings
+from gitea_mcp_remote.middleware import BearerAuthMiddleware, HealthCheckBypassMiddleware
+from gitea_mcp_remote.filtering import ToolFilter
+
+logger = logging.getLogger(__name__)
+
+
+async def health_check(request):
+    """Health check endpoint - bypasses authentication."""
+    return JSONResponse({"status": "ok"})
+
+
+def create_app():
+    """Create the Starlette application with middleware."""
+    settings = load_settings()
+
+    # Set up tool filtering
+    tool_filter = ToolFilter(
+        enabled_tools=settings.enabled_tools_list,
+        disabled_tools=settings.disabled_tools_list,
+    )
+
+    # Convert to list for marketplace API
+    tool_names = None  # means "all"
+    if tool_filter.enabled_tools:
+        tool_names = list(tool_filter.enabled_tools)
+
+    # TODO: Issue #24 will add MCP protocol endpoints
+    # from mcp_server import get_tool_definitions, create_tool_dispatcher, GiteaClient, GiteaConfig
+
+    routes = [
+        Route("/health", health_check, methods=["GET"]),
+        # MCP endpoints will be added in Issue #24
+    ]
+
+    app = Starlette(routes=routes)
+
+    # Apply middleware (order matters - health bypass first)
+    app = HealthCheckBypassMiddleware(app)
+    if settings.auth_token:
+        app = BearerAuthMiddleware(app, token=settings.auth_token)
+
+    return app
+
+
+def main():
+    """Entry point for the gitea-mcp-remote command."""
+    settings = load_settings()
+    app = create_app()
+
+    logger.info(f"Starting Gitea MCP Remote on {settings.http_host}:{settings.http_port}")
+    uvicorn.run(app, host=settings.http_host, port=settings.http_port)
+
+
+if __name__ == "__main__":
+    main()