chore: use cargo-binstall for faster cargo-zigbuild installation

Replace `cargo install cargo-zigbuild` (compiles from source, ~40s)
with `cargo binstall` (downloads pre-built binary, ~5s).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mikkeldamsgaard

.github/workflows/ci.yml

@@ -44,8 +44,8 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: ${{ matrix.target }}
-      - name: Install cargo-zigbuild
-        run: pip install ziglang && cargo install cargo-zigbuild
+      - name: Install zig and cargo-zigbuild
+        run: pip install ziglang && curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh | bash && cargo binstall -y cargo-zigbuild
       - uses: mozilla-actions/sccache-action@v0.0.9
       - name: Cross-compile for ${{ matrix.arch }}
         run: cargo zigbuild --release --target ${{ matrix.target }}

.github/workflows/release.yml

@@ -37,8 +37,8 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: ${{ matrix.target }}
-      - name: Install cargo-zigbuild
-        run: pip install ziglang && cargo install cargo-zigbuild
+      - name: Install zig and cargo-zigbuild
+        run: pip install ziglang && curl -L --proto '=https' --tlsv1.2 -sSf https://raw.githubusercontent.com/cargo-bins/cargo-binstall/main/install-from-binstall-release.sh | bash && cargo binstall -y cargo-zigbuild
       - uses: mozilla-actions/sccache-action@v0.0.9
       - name: Cross-compile for ${{ matrix.arch }}
         run: cargo zigbuild --release --target ${{ matrix.target }}