add build workflow (#122)

.github/workflows/build.yml

@@ -0,0 +1,68 @@
+name: Publish Package to npmjs
+
+on:
+  workflow_call:
+    inputs:
+      branch:
+        description: 'Which branch to build'
+        default: 'main'
+        required: true
+        type: string
+jobs:
+    build:
+        name: Publish
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v3
+              ref: "${{ inputs.branch }}"
+
+            - name: Install Node.js
+              uses: actions/setup-node@v3
+              with:
+                  node-version: 20
+                  registry-url: "https://registry.npmjs.org"
+
+            - name: Install pnpm
+              uses: pnpm/action-setup@v2
+              with:
+                  version: 9
+
+            - name: Install Rust toolchain
+              uses: actions-rust-lang/setup-rust-toolchain@v1
+              with:
+                  toolchain: 1.81.0
+
+            - name: Install wasm-pack
+              run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+            - name: Extract versions
+              run: |
+                  echo "GIT_TAG=${GITHUB_REF##*/}" >> $GITHUB_ENV
+                  echo "PKG_VERSION=$(node -p "require('./package.json').version")" >> $GITHUB_ENV
+
+            - name: Assert package versions
+              run: |
+                  echo "CM_VERSION=$CM_VERSION"
+                  echo "PKG_VERSION=$PKG_VERSION"
+
+                  if [[ "v$PKG_VERSION" != "$GIT_TAG" ]]; then
+                    echo "Version mismatch! Please correct package versions"
+                    exit 1
+                  else
+                    echo "Version check complete"
+                  fi
+
+            - name: Install NPM dependencies
+              run: pnpm install
+
+            - name: Build & Bundle
+              run: pnpm build
+
+            - name: Pack
+              run: npm pack --pack-destination ~
+
+            - uses: actions/upload-artifact@v4
+              with:
+                  name: packed
+                  path: "~/*.tgz"