Refactor installation process: add setup script for streamlined setup and linking

Author: devartifex

README.md

@@ -24,12 +24,11 @@ A zero-config **statusline + local dashboard** that turns Copilot CLI's OpenTele
 ```bash
 git clone https://github.com/devartifex/copilot-cost.git
 cd copilot-cost
-npm install
-npm run build
-npm link            # makes the `copilot-cost` command available on your PATH
-copilot-cost install
+npm run setup       # installs deps, builds, links the `copilot-cost` command, runs install + doctor
 ```
 
+> Prefer manual control? The equivalent steps are `npm install && npm run build && npm link && copilot-cost install`.
+
 Then **restart your shell and restart `copilot`**. That's it.
 
 The installer configures the Copilot CLI statusline (including the required `"experimental": true` flag in `~/.copilot/settings.json` — the GitHub Copilot CLI gates custom status lines behind that flag), appends an idempotent OpenTelemetry block to your shell profile, and enables local JSONL span output under `~/.copilot/otel/`. It does **not** start the dashboard.

package.json

@@ -44,6 +44,7 @@
     "lint": "tsc --noEmit",
     "start": "node dist/cli.js",
     "cli": "npm run build --silent && node dist/cli.js",
+    "setup": "npm install && npm run build && npm link && node dist/cli.js install && node dist/cli.js doctor",
     "local:install": "npm run build && node dist/cli.js install",
     "local:uninstall": "node dist/cli.js uninstall",
     "local:doctor": "node dist/cli.js doctor",