feat: Implement core functionality for DTC C/C++ IDE

- Added ProjectManager class to handle project operations including opening, closing, building, and running projects.
- Introduced SyntaxHighlighter class for syntax highlighting in C and C++ files.
- Developed TerminalWidget for command execution and output display.
- Created TextEditor with line numbering and auto-indentation features.
- Established main application entry point in main.cpp.
- Designed UI layout for MainWindow using Qt Designer.

run.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Run script for DTC C/C++ IDE
+
+echo "🚀 Starting DTC C/C++ IDE..."
+
+# Check if built
+if [ ! -f "build/dtc-ide.app/Contents/MacOS/dtc-ide" ] && [ ! -f "build/dtc-ide" ]; then
+    echo "❌ IDE not built yet. Please run ./build.sh first"
+    exit 1
+fi
+
+# Run the IDE
+if [ -f "build/dtc-ide.app/Contents/MacOS/dtc-ide" ]; then
+    echo "📱 Running macOS app bundle..."
+    open build/dtc-ide.app
+elif [ -f "build/dtc-ide" ]; then
+    echo "🖥️  Running executable..."
+    cd build
+    ./dtc-ide
+fi