docs: add install script and update README installation instructions

Author: Jamkris

README.md

@@ -15,11 +15,15 @@ This extension provides production-ready agents, skills, hooks, commands, rules,
 
 Get up and running in under 2 minutes:
 
-### Option 1: Install via Gemini CLI (Recommended)
+### Option 1: Quick Install (Recommended)
 
 ```bash
-# Install directly from GitHub
-gemini extensions install https://github.com/Jamkris/everything-gemini-code
+# Clone the repository
+git clone https://github.com/Jamkris/everything-gemini-code.git
+
+# Run installation script
+cd everything-gemini-code
+./install.sh
 ```
 
 ### Option 2: Manual Installation (Advanced)

install.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+# Gemini CLI Extension Installer
+# Installs agents, skills, commands, and rules to ~/.gemini/
+
+set -e
+
+GEMINI_DIR="$HOME/.gemini"
+
+echo "Installing Gemini CLI Extensions..."
+
+# Ensure directories exist
+mkdir -p "$GEMINI_DIR/agents"
+mkdir -p "$GEMINI_DIR/commands"
+mkdir -p "$GEMINI_DIR/skills"
+mkdir -p "$GEMINI_DIR/rules"
+
+# Copy agents
+if [ -d "agents" ]; then
+    echo "Copying agents..."
+    cp agents/*.md "$GEMINI_DIR/agents/"
+fi
+
+# Copy commands
+if [ -d "commands" ]; then
+    echo "Copying commands..."
+    cp commands/*.md "$GEMINI_DIR/commands/"
+fi
+
+# Copy skills
+if [ -d "skills" ]; then
+    echo "Copying skills..."
+    cp -r skills/* "$GEMINI_DIR/skills/"
+fi
+
+# Copy rules
+# Note: Rules are usually project-specific but we install common ones here
+if [ -d "rules/common" ]; then
+    echo "Copying common rules..."
+    cp -r rules/common/* "$GEMINI_DIR/rules/"
+fi
+
+echo "Installation complete! 🚀"
+echo "You can now use the installed extensions with Gemini CLI."