Add local development infrastructure and documentation

Add essential development tools and documentation for Cthulhu development:

Development Scripts:
- build-local.sh: Local build and install to ~/.local
- clean-local.sh: Clean build artifacts and local installation
- test-local.sh: Test local installation

Documentation:
- README-REMOTE-CONTROLLER.md: D-Bus service API documentation
- README-DEVELOPMENT.md: Development workflow documentation
- .gitignore: Updated with local build artifact patterns

These tools enable efficient local development without system-wide installation
and provide proper documentation for the D-Bus remote control capabilities.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

test-local.sh

@@ -0,0 +1,63 @@
+#!/bin/bash
+# Test script for local Cthulhu installation
+
+set -e
+
+# Colors
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+RED='\033[0;31m'
+NC='\033[0m'
+
+LOCAL_PREFIX="$HOME/.local"
+CTHULHU_BIN="${LOCAL_PREFIX}/bin/cthulhu"
+
+echo -e "${GREEN}=== Testing Local Cthulhu Installation ===${NC}"
+
+# Check if binary exists
+if [[ ! -f "$CTHULHU_BIN" ]]; then
+    echo -e "${RED}Error: Cthulhu binary not found at $CTHULHU_BIN${NC}"
+    echo -e "${YELLOW}Run ./build-local.sh first${NC}"
+    exit 1
+fi
+
+echo -e "${YELLOW}Testing basic functionality...${NC}"
+
+# Test version
+echo -n "Version check: "
+if "$CTHULHU_BIN" --version >/dev/null 2>&1; then
+    echo -e "${GREEN}✓${NC}"
+else
+    echo -e "${RED}✗${NC}"
+fi
+
+# Test help
+echo -n "Help option: "
+if "$CTHULHU_BIN" --help >/dev/null 2>&1; then
+    echo -e "${GREEN}✓${NC}"
+else
+    echo -e "${RED}✗${NC}"
+fi
+
+# Test D-Bus service import
+echo -n "D-Bus service: "
+if PYTHONPATH="${LOCAL_PREFIX}/lib/python3.*/site-packages" python3 -c "
+import sys
+sys.path.insert(0, '${LOCAL_PREFIX}/lib/python3.13/site-packages')
+try:
+    import cthulhu.dbus_service
+    controller = cthulhu.dbus_service.get_remote_controller()
+    print('D-Bus available:', controller._dasbus_available, file=sys.stderr)
+    print('SUCCESS')
+except Exception as e:
+    print('ERROR:', e, file=sys.stderr)
+    sys.exit(1)
+" 2>/dev/null; then
+    echo -e "${GREEN}✓${NC}"
+else
+    echo -e "${YELLOW}~ (expected during development)${NC}"
+fi
+
+echo ""
+echo -e "${GREEN}Local build test complete!${NC}"
+echo -e "${YELLOW}To run Cthulhu: ${CTHULHU_BIN}${NC}"