feat: add install script for VS Code extension and forks

script/install.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+BUILD_DIR="$PROJECT_DIR/build"
+
+# --- Build ---
+echo "==> Building VS Code extension..."
+"$SCRIPT_DIR/build.sh" vscode
+
+# --- Find VSIX ---
+VSIX_FILE=$(ls -t "$BUILD_DIR"/*.vsix 2>/dev/null | head -1)
+if [ -z "$VSIX_FILE" ]; then
+    echo "Error: No .vsix file found in $BUILD_DIR"
+    exit 1
+fi
+echo "==> Found VSIX: $(basename "$VSIX_FILE")"
+
+# --- Detect & Install ---
+# VS Code and known forks that support --install-extension
+CLI_NAMES=("code" "codium" "cursor" "trae" "windsurf" "kiro" "antigravity" "qoder")
+
+INSTALLED=0
+FAILED=0
+
+for cli in "${CLI_NAMES[@]}"; do
+    if command -v "$cli" &>/dev/null; then
+        echo "==> Installing into $cli..."
+        if "$cli" --install-extension "$VSIX_FILE" --force 2>&1; then
+            echo "    ✓ $cli: installed successfully"
+            ((INSTALLED++))
+        else
+            echo "    ✗ $cli: installation failed"
+            ((FAILED++))
+        fi
+    else
+        echo "    - $cli: not found, skipping"
+    fi
+done
+
+# --- Summary ---
+echo ""
+if [ $INSTALLED -eq 0 ] && [ $FAILED -eq 0 ]; then
+    echo "No VS Code forks detected. Supported CLIs: ${CLI_NAMES[*]}"
+    echo "Make sure the CLI command is in your PATH (e.g., install 'code' command from VS Code Command Palette)."
+    exit 1
+fi
+
+echo "Done. Installed: $INSTALLED, Failed: $FAILED"