chore(plugin/jshandler): remove JS handler plugin implementation and related tests

- Removed the entire `jshandler` plugin implementation, including `abi.go`, `engine.go`, `config.go`, and associated test files.
- Deleted the `scripts` directory containing JavaScript examples.
- Cleaned up the `go.mod` and `go.sum` dependencies related to `jshandler`.
- Ensured redundant code and files associated with the removed plugin are purged from the repository.

.github/workflows/release.yaml

@@ -40,6 +40,10 @@ jobs:
           - `CLIProxyAPI_<version>_linux_<arch>.tar.gz` is the default Linux build. It supports dynamic library plugins and is built against a GLIBC 2.17 baseline.
           - `CLIProxyAPI_<version>_linux_<arch>_no-plugin.tar.gz` is the portable Linux build for musl-based or older systems such as OpenWrt. It does not support dynamic library plugins.
 
+          ## FreeBSD release assets
+
+          - `CLIProxyAPI_<version>_freebsd_aarch64_no-plugin.tar.gz` is the FreeBSD arm64 build. It is built without CGO and does not support dynamic library plugins.
+
           <!-- cliproxyapi-linux-release-assets:end -->
           EOF
 
@@ -489,21 +493,28 @@ jobs:
           gh release upload "$GITHUB_REF_NAME" "$tmp_dir/checksums.txt" --clobber
 
   build-freebsd:
-    name: build freebsd-${{ matrix.goarch }}
+    name: build ${{ matrix.target }}
     needs: prepare-release
     runs-on: ubuntu-latest
     env:
-      TARGET: freebsd-${{ matrix.goarch }}
+      TARGET: ${{ matrix.target }}
       GOARCH: ${{ matrix.goarch }}
       ASSET_ARCH: ${{ matrix.asset_arch }}
+      ASSET_SUFFIX: ${{ matrix.asset_suffix }}
     strategy:
       fail-fast: false
       matrix:
         include:
-          - goarch: amd64
+          - target: freebsd-amd64
+            goarch: amd64
             asset_arch: amd64
-          - goarch: arm64
+            asset_suffix: ''
+            cgo_enabled: true
+          - target: freebsd-arm64-no-plugin
+            goarch: arm64
             asset_arch: aarch64
+            asset_suffix: _no-plugin
+            cgo_enabled: false
     steps:
       - uses: actions/checkout@v6
         with:
@@ -540,13 +551,19 @@ jobs:
           echo "release_version=$release_version" >> "$GITHUB_OUTPUT"
           echo "commit=$commit" >> "$GITHUB_OUTPUT"
           echo "build_date=$build_date" >> "$GITHUB_OUTPUT"
-      - name: Install FreeBSD cross-build dependencies
+      - name: Prepare FreeBSD output
+        shell: bash
         run: |
           set -euo pipefail
           rm -rf "dist/${TARGET}"
+      - name: Install FreeBSD cross-build dependencies
+        if: ${{ matrix.cgo_enabled }}
+        run: |
+          set -euo pipefail
           sudo apt-get update
           sudo apt-get install -y clang lld wget
-      - name: Build FreeBSD binary
+      - name: Build FreeBSD binary with CGO
+        if: ${{ matrix.cgo_enabled }}
         timeout-minutes: 45
         uses: go-cross/cgo-actions@v1
         with:
@@ -560,13 +577,22 @@ jobs:
             -X main.Version=${{ steps.metadata.outputs.release_version }}
             -X main.Commit=${{ steps.metadata.outputs.commit }}
             -X main.BuildDate=${{ steps.metadata.outputs.build_date }}
+      - name: Build FreeBSD no-plugin binary
+        if: ${{ !matrix.cgo_enabled }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          mkdir -p "dist/${TARGET}/bin"
+          CGO_ENABLED=0 GOOS=freebsd GOARCH="$GOARCH" go build -buildvcs=false \
+            -ldflags="-s -w -X main.Version=${RELEASE_VERSION} -X main.Commit=${COMMIT} -X main.BuildDate=${BUILD_DATE}" \
+            -o "dist/${TARGET}/bin/cli-proxy-api" ./cmd/server/
       - name: Package FreeBSD archive
         shell: bash
         run: |
           set -euo pipefail
 
           archive_dir="dist/${TARGET}/archive"
-          archive_name="CLIProxyAPI_${RELEASE_VERSION}_freebsd_${ASSET_ARCH}.tar.gz"
+          archive_name="CLIProxyAPI_${RELEASE_VERSION}_freebsd_${ASSET_ARCH}${ASSET_SUFFIX}.tar.gz"
           mkdir -p "$archive_dir"
 
           echo "Packaging ${archive_name}"
@@ -575,7 +601,7 @@ jobs:
           tar -C "$archive_dir" -czf "dist/$archive_name" cli-proxy-api LICENSE README.md README_CN.md config.example.yaml
       - uses: actions/upload-artifact@v4
         with:
-          name: freebsd-${{ matrix.goarch }}
+          name: ${{ matrix.target }}
           path: dist/CLIProxyAPI_*
           if-no-files-found: error
       - name: Upload release assets