chore: drop dead fork dev-app cruft (feat/dws-devapp) (#507)

Two leftovers referenced the decommissioned wxianfeng fork branch
`feat/dws-devapp`, both now obsolete after the dev-app work landed on main
(v1.0.42) and the installers were repointed to DingTalk-Real-AI (#505):

  - .github/workflows/auto-dev-release.yml — triggered only on push to
    feat/dws-devapp (a branch that does not exist on this repo, so it never
    fires). Its purpose — auto-publishing fork dev-preview releases for
    install-devapp.sh — is gone now that install-devapp.sh pulls stable
    releases from DingTalk-Real-AI.
  - docs/devapp-yulan-command-routing.md — a 2026-06-05 draft design doc
    pinned to the fork branch and the pre-rename `devapp` command tree,
    superseded by the shipped `dws dev` command set and the rewritten
    docs/devapp-agent-install-guide.md.

After this, the repo has zero `wxianfeng` / `feat/dws-devapp` references.

.github/workflows/auto-dev-release.yml

@@ -1,103 +0,0 @@
-name: Auto Dev Release
-
-# 推到 dev 分支 → 跑测试 → 通过才自动出一个 dev 预览 release。
-# install-devapp.sh / .ps1 取 fork 最新 release，所以发完安装链接即最新。
-#
-# 设计要点：
-# - 自包含：测试 + 算版本 + 打 tag + 发 release 全在一个 job，不依赖 tag 触发
-#   release.yml（GITHUB_TOKEN 推的 tag 本来也不会触发别的 workflow）。
-# - 质量门：测试这一步失败，后面发布步骤就不会跑。
-# - 不含 npm publish，所以自动发布天然是绿的。
-on:
-  push:
-    branches:
-      - feat/dws-devapp
-
-# 串行：两次 push 不会同时算版本号撞车
-concurrency:
-  group: auto-dev-release
-  cancel-in-progress: false
-
-permissions:
-  contents: write
-
-jobs:
-  test-and-release:
-    runs-on: ubuntu-latest
-    timeout-minutes: 30
-    steps:
-      - name: Check out repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          fetch-tags: true
-
-      - name: Set up Go
-        uses: actions/setup-go@v5
-        with:
-          go-version-file: go.mod
-
-      - name: Install archive tooling
-        run: sudo apt-get update && sudo apt-get install -y zip unzip
-
-      # ---- 质量门：测试不过就不发 ----
-      - name: Build
-        run: make build
-
-      - name: Test
-        run: go test -race -count=1 -timeout=5m ./cmd/... ./internal/...
-
-      # ---- 算下一个 dev 版本号并打 tag ----
-      - name: Compute next dev version
-        id: ver
-        run: |
-          set -eu
-          LATEST=$(git tag -l 'v*-dev.*' --sort=-v:refname | head -1 || true)
-          if [ -z "$LATEST" ]; then
-            BASE="v1.0.39"; N=0
-          else
-            BASE=$(printf '%s' "$LATEST" | sed -E 's/-dev\.[0-9]+$//')
-            N=$(printf '%s' "$LATEST" | sed -E 's/.*-dev\.([0-9]+)$/\1/')
-          fi
-          NEW="${BASE}-dev.$((N + 1))"
-          echo "version=$NEW" >> "$GITHUB_OUTPUT"
-          echo "next dev release: $NEW (prev: ${LATEST:-none})"
-
-      - name: Create and push tag
-        run: |
-          set -eu
-          V="${{ steps.ver.outputs.version }}"
-          git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git tag "$V"
-          git push origin "$V"
-
-      # ---- 自己发 release（不靠 tag 触发 release.yml）----
-      - name: Install rcodesign (ad-hoc sign darwin binaries from Linux)
-        run: |
-          set -eu
-          RCS_VERSION="0.27.0"
-          curl -fsSL -o /tmp/rcodesign.tar.gz \
-            "https://github.com/indygreg/apple-platform-rs/releases/download/apple-codesign%2F${RCS_VERSION}/apple-codesign-${RCS_VERSION}-x86_64-unknown-linux-musl.tar.gz"
-          mkdir -p /tmp/rcodesign
-          tar -xzf /tmp/rcodesign.tar.gz -C /tmp/rcodesign --strip-components=1
-          sudo install -m 0755 /tmp/rcodesign/rcodesign /usr/local/bin/rcodesign
-          rcodesign --version
-
-      - name: Run GoReleaser
-        uses: goreleaser/goreleaser-action@v6
-        with:
-          version: "~> v2"
-          args: release --clean
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Post-release packaging
-        run: ./scripts/release/post-goreleaser.sh
-        env:
-          DWS_PACKAGE_VERSION: ${{ steps.ver.outputs.version }}
-
-      - name: Upload dws-skills.zip to release
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: gh release upload "${{ steps.ver.outputs.version }}" dist/dws-skills.zip --clobber