Fix next steps to use npx instead of global codegraph command

Users running via npx don't have the codegraph command installed
globally. Update installer message and README to use
npx @colbymchenry/codegraph init -i instead.

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

README.md

@@ -172,7 +172,7 @@ For each project you want to use CodeGraph with:
 
 ```bash
 cd your-project
-codegraph init -i
+npx @colbymchenry/codegraph init -i
 ```
 
 That's it! Claude Code will now use CodeGraph tools automatically when a `.codegraph/` directory exists.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@colbymchenry/codegraph",
-  "version": "0.2.2",
+  "version": "0.2.3",
   "description": "A local-first code intelligence system that builds a semantic knowledge graph from any codebase",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",

src/installer/banner.ts

@@ -121,7 +121,7 @@ export function showNextSteps(location: 'global' | 'local'): void {
   if (location === 'global') {
     console.log(chalk.dim('  Quick start:'));
     console.log(chalk.dim('    cd your-project'));
-    console.log(chalk.cyan('    codegraph init -i'));
+    console.log(chalk.cyan('    npx @colbymchenry/codegraph init -i'));
   } else {
     console.log(chalk.dim('  CodeGraph is ready to use in this project!'));
   }