feat: 添加 VitePress 文档站和 Gitea CI 部署

- 新增 docs/ 目录，使用 VitePress 构建文档站
- 添加 .gitea/workflows/deploy.yaml，部署到 Cloudflare Pages
- 新增 setup.sh 一站式安装脚本（兼容 macOS bash 3.x）
- 修复 Gemini CLI 脚本认证头（改用 Authorization: Bearer）

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

GeminiCLI/setup-gemini.ps1

@@ -132,15 +132,15 @@ function Test-ApiConnection {
         try {
             $headers = @{
                 "Content-Type" = "application/json"
-                "x-goog-api-key" = $ApiKey
+                "Authorization" = "Bearer $ApiKey"
             }
 
             $testEndpoint = "$baseUrl/v1/models"
             $response = Invoke-RestMethod -Uri $testEndpoint -Method Get -Headers $headers -ErrorAction Stop
 
-            # Check if response contains models
-            if ($response.models) {
-                $modelCount = $response.models.Count
+            # Check if response contains models (supports both data and models arrays)
+            if ($response.data -or $response.models) {
+                $modelCount = if ($response.data) { $response.data.Count } else { $response.models.Count }
                 Write-Success "API connection successful! Found $modelCount models at $baseUrl"
                 return $baseUrl
             } else {