feat: GitHub Actions 构建后同步发布到 Gitea Releases

构建只在 GitHub windows-latest 上跑一次，产物通过 Gitea REST API 上传到
Gitea Releases，让国内无法访问 GitHub 的用户也能下载到 exe。

- .github/workflows/release.yml: 新增 Mirror release to Gitea 步骤，
  调用 /api/v1/repos/.../releases 创建发布并上传 zip 资产；
  GITEA_TOKEN 未配置时仅警告跳过，不阻断 GitHub release
- .gitea/workflows/release.yml: 删除。Gitea NAS 上的 Linux runner 无法
  交叉编译 Windows exe，本仓库不再使用 Gitea Actions
- README: 在下载步骤列出 Gitea / GitHub 双下载渠道
- CHANGELOG: v0.1.0 条目同步更新

.gitea/workflows/release.yml

@@ -1,79 +0,0 @@
-name: release
-
-on:
-  push:
-    tags:
-      - 'v*'
-  workflow_dispatch:
-    inputs:
-      tag:
-        description: 'Release tag, 例如 v0.1.0（会自动创建 tag 并发布 release）'
-        required: true
-        type: string
-
-jobs:
-  build:
-    # 需要一台带 Windows 的自托管 act_runner（Gitea 没有官方 hosted Windows runner）
-    # 默认按 act_runner 常见标签 windows-latest；按你的 runner 实际 label 调整
-    runs-on: windows-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Resolve release tag
-        shell: pwsh
-        run: |
-          if ($env:GITHUB_EVENT_NAME -eq 'workflow_dispatch') {
-            $t = '${{ inputs.tag }}'
-          } else {
-            $t = $env:GITHUB_REF_NAME
-          }
-          echo "RELEASE_TAG=$t" >> $env:GITHUB_ENV
-
-      - uses: actions/setup-python@v5
-        with:
-          python-version: '3.12'
-
-      - name: Install dependencies
-        run: pip install -r requirements.txt
-
-      - name: Build exe
-        run: pyinstaller --onefile --uac-admin --console --name df-scope-hold script.py
-
-      - name: Package release zip
-        shell: pwsh
-        run: |
-          New-Item -ItemType Directory -Force -Path release | Out-Null
-          Copy-Item dist/df-scope-hold.exe release/
-          Copy-Item config.ini release/
-          Copy-Item README.md release/
-          Compress-Archive -Path release/* -DestinationPath "df-scope-hold-$env:RELEASE_TAG.zip" -Force
-          echo "ASSET_ZIP=df-scope-hold-$env:RELEASE_TAG.zip" >> $env:GITHUB_ENV
-
-      - name: Upload workflow artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: df-scope-hold-${{ env.RELEASE_TAG }}
-          path: ${{ env.ASSET_ZIP }}
-
-      - name: Extract release notes from CHANGELOG.md
-        shell: pwsh
-        run: |
-          $content = Get-Content CHANGELOG.md -Raw
-          $escaped = [regex]::Escape($env:RELEASE_TAG)
-          $pattern = "(?ms)^## \[$escaped\].*?(?=^## |\Z)"
-          $m = [regex]::Match($content, $pattern)
-          if ($m.Success) {
-            $body = ($m.Value -replace '^## .*\r?\n', '').Trim()
-          } else {
-            $body = "Release $env:RELEASE_TAG"
-          }
-          $date = [DateTime]::UtcNow.ToString('yyyy-MM-dd')
-          $body = "**发布日期**: $date (UTC)`n`n" + $body
-          Set-Content -Path release-notes.md -Value $body -Encoding utf8
-
-      - name: Create Gitea Release
-        uses: akkuman/gitea-release-action@v1
-        with:
-          tag_name: ${{ env.RELEASE_TAG }}
-          files: ${{ env.ASSET_ZIP }}
-          body_path: release-notes.md