ci(release): native runners per target, enable CGO for tree-sitter bindings (#1)

The v1.0.0 release build failed because go-tree-sitter and
tree-sitter-c-sharp/bindings/go (pulled in transitively by
./cmd/wasmforge via internal/patch) are CGO-only — every .go file in
those packages has `//go:build cgo` constraints, so CGO_ENABLED=0
excludes them entirely and `go build` errors with "build constraints
exclude all Go files".

The dependency landed in commit e760329 (May 27, 2026, AST patcher
Phase 3.1) — after the last successful v0.5.7 release on May 14, so
the CGO_ENABLED=0 cross-compile worked then but silently broke once
tree-sitter joined the import graph.

Fix:
- Switch the build matrix from a single ubuntu-latest runner doing
  4-way cross-compile to one native runner per target: ubuntu-latest
  (linux/amd64), windows-latest (windows/amd64), macos-13 (darwin
  Intel), macos-latest (darwin ARM64). Each runner ships with a
  matching C toolchain (gcc / mingw / clang) for tree-sitter's C core.
- Set CGO_ENABLED=1 in the Build step.

generate-assets and release jobs stay on ubuntu-latest — cmd/gen-build-assets
does not import tree-sitter (verified via `go list -deps`), and the
final action-gh-release step only collects pre-built artifacts.

Note: this fix needs to be cherry-picked into wasmforge-internal as
well so future syncs don't lose it. The two repos currently share this
file byte-for-byte.

.github/workflows/release.yml

@@ -32,22 +32,26 @@ jobs:
 
   build:
     needs: generate-assets
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.runs-on }}
     strategy:
       matrix:
         include:
-          - goos: windows
-            goarch: amd64
-            ext: .exe
           - goos: linux
             goarch: amd64
             ext: ''
+            runs-on: ubuntu-latest
+          - goos: windows
+            goarch: amd64
+            ext: .exe
+            runs-on: windows-latest
           - goos: darwin
             goarch: amd64
             ext: ''
+            runs-on: macos-13
           - goos: darwin
             goarch: arm64
             ext: ''
+            runs-on: macos-latest
     steps:
       - uses: actions/checkout@v4
 
@@ -67,7 +71,7 @@ jobs:
         env:
           GOOS: ${{ matrix.goos }}
           GOARCH: ${{ matrix.goarch }}
-          CGO_ENABLED: '0'
+          CGO_ENABLED: '1'
           GOWORK: 'off'
         run: go build -trimpath -o wasmforge-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.ext }} ./cmd/wasmforge