[CI/Build] Modify biweekly report readme files (#131)

Co-authored-by: v_lihao66 <v_lihao66@baidu.com>

community/readme.md

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+# GitHub CI/CD Data Collection Tool
+
+This tool is used to pull activity data from specified GitHub repositories within a given time window (e.g., PRs, Issues, Contributors, Stars, etc.), which can then be used for further analysis and visualization.
+
+Suitable for:
+- Engineering productivity metrics (PR/Issue/Contributors/Stars within a period)
+- CI/CD change tracking (by time range)
+- Batch data collection for a single repository
+
+---
+
+## Directory Structure
+
+```text
+community/
+  collect_github_data.py
+```
+
+---
+
+## Requirements
+
+- Python 3.8+ (recommended 3.10+)
+- Network access to the GitHub API
+- GitHub Personal Access Token (PAT)
+
+---
+
+## Quick Start
+
+### 1) Create a virtual environment (recommended)
+
+```bash
+python3 -m venv venv/dev-cicd
+source venv/dev-cicd/bin/activate
+```
+
+(Optional) Upgrade pip:
+
+```bash
+pip install -U pip
+```
+
+---
+
+### 2) Configure a GitHub Token (required)
+
+This tool fetches data through the GitHub API. To avoid API rate limits and ensure access to private repositories, it is recommended to configure a personal token.
+
+1. Open the token creation page:  
+   https://github.com/settings/tokens
+2. Create a token (read-only permissions are sufficient)
+3. Export the token as an environment variable:
+
+```bash
+export GH_PAT=xxx
+```
+
+> ⚠️ Do NOT hardcode your token or commit it into the repository.
+
+---
+
+### 3) Set collection parameters and run
+
+```bash
+export START_DATE=2025-12-08
+export END_DATE=2026-01-24
+export TARGET_REPOS=baidu/vLLM-Kunlun
+
+python community/collect_github_data.py
+```
+
+---
+
+## Parameters
+
+The tool is configured via environment variables:
+
+| Parameter | Required | Example | Description |
+|----------|----------|---------|-------------|
+| `GH_PAT` | ✅ | `ghp_xxx` | GitHub Personal Access Token |
+| `START_DATE` | ✅ | `2025-12-08` | Collection start date (format: YYYY-MM-DD) |
+| `END_DATE` | ✅ | `2026-01-24` | Collection end date (format: YYYY-MM-DD) |
+| `TARGET_REPOS` | ✅ | `baidu/vLLM-Kunlun` | Target repositories (supports multiple) |