docs: update CONTRIBUTING.md

Author: BioPhoton

packages/plugin-bundle-stats/CONTRIBUTING.md

@@ -1,85 +1,13 @@
-# @code-pushup/bundle-stats-plugin
+# Contributing
 
-## Data Processing pipeline
+## Development
 
-1. `bundle-stats` plugin collects bundle stats from the build output.
-2. `bundle-stats` plugin processes the stats and creates a unified tree.
-3. `bundle-stats` plugin filters the tree by the config.
-4. `bundle-stats` plugin creates a report.
+### Running the plugin
 
-## Data Processing pipeline
-
-1. `bundle-stats` plugin collects bundle stats from the build output.
-
-## Data
-
-Great question — understanding the difference between imports and inputs is essential when analyzing bundler output (especially from tools like esbuild, webpack, or Rollup). Here's a clear breakdown:
-
-# Bundle Stats Data Structure
-
-## Imports vs Inputs
-
-Understanding the difference between **imports** and **inputs** is essential when analyzing bundler output.
-
-### 🔗 Imports
-
-**What:** Links between output files (chunk-to-chunk dependencies)
-
-**Example:**
-
-```typescript
-// dynamic import
-import { something } from './shared.js';
-
-// If main.js has these imports:
-import('./route1'); // dynamic import
-// static import
+```bash
+nx code-pushup plugin-bundle-stats
 ```
 
-**ESBuild stats:**
-
-```typescript
-"main-TVMA6NI7.js": {
-  imports: [
-    { path: "chunk-5QRGP6BJ.js", kind: "import-statement" },
-    { path: "chunk-NY7Q4ZJ6.js", kind: "dynamic-import" }
-  ]
-}
+```bash
+npx @code-pushup/cli collect --config packages/plugin-bundle-stats/code-pushup.config.ts
 ```
-
-**Purpose:** Build dependency graph between chunks at runtime
-
-### 📁 Inputs
-
-**What:** Original source files bundled into a specific output
-
-**Example:**
-
-```typescript
-// If main-TVMA6NI7.js was generated from:
-// - src/main.ts
-// - src/app/app.component.ts
-// - node_modules/@angular/core/core.mjs
-```
-
-**ESBuild stats:**
-
-```typescript
-"main-TVMA6NI7.js": {
-  inputs: {
-    "src/main.ts": { bytesInOutput: 37 },
-    "node_modules/@angular/router/router.mjs": { bytesInOutput: 64170 }
-  }
-}
-```
-
-**Purpose:** Analyze file contributions and size breakdown
-
-### Summary
-
-| Concept    | Meaning                        | Granularity    | Example                        |
-| ---------- | ------------------------------ | -------------- | ------------------------------ |
-| **Import** | Link to another output chunk   | Chunk-to-chunk | `main.js` → `route1.js`        |
-| **Input**  | Source file bundled into chunk | File-to-chunk  | `src/main.ts`, `rxjs/index.js` |
-
-> **💡 Quick tip:** Imports = dependency graph • Inputs = size analysis