Build native Z3 for x64 before generating docs (#8086)

* Initial plan

* Build Z3 for ubuntu x64 and invoke JS build scripts in docs workflow

- Modified docs.yml to build Z3 natively for ubuntu-latest x64 before documentation generation
- Removed default working directory to allow explicit working-directory per step
- Added step to build Z3 using python scripts/mk_make.py
- Kept emscripten setup as required for wasm build
- Modified mk_api_doc.py to invoke npm run build:ts and npm run build:wasm as described in src/api/js/README.md
- mk_api_doc.py now runs the full build process (TypeScript + wasm) before generating documentation

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Source emsdk environment before generating documentation

- Added source command to ensure emscripten tools are in PATH when mk_api_doc.py runs npm scripts
- This ensures emcc and other emscripten tools are available for npm run build:wasm

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

* Revert changes to mk_api_doc.py

- Removed npm run build:ts and npm run build:wasm calls from mk_api_doc.py
- Reverted to only calling npm run docs as before

Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>

.github/workflows/docs.yml

@@ -14,10 +14,6 @@ concurrency:
   group: "pages"
   cancel-in-progress: false
 
-defaults:
-  run:
-    working-directory: src/api/js
-
 env:
   EM_VERSION: 3.1.73
 
@@ -37,7 +33,13 @@ jobs:
       - name: Install system dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install -y doxygen graphviz
+          sudo apt-get install -y doxygen graphviz python3
+
+      - name: Build Z3 for ubuntu-latest x64
+        run: |
+          python3 scripts/mk_make.py
+          cd build
+          make -j$(nproc)
 
       - name: Setup emscripten
         uses: mymindstorm/setup-emsdk@v14
@@ -46,22 +48,19 @@ jobs:
           version: ${{env.EM_VERSION}}
           actions-cache-folder: "emsdk-cache"
 
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Build TypeScript
-        run: npm run build:ts
-
-      - name: Build wasm
+      - name: Install emscripten
         run: |
           emsdk install ${EM_VERSION}
           emsdk activate ${EM_VERSION}
-          source $(dirname $(which emsdk))/emsdk_env.sh
-          npm run build:wasm
+
+      - name: Install JS dependencies
+        working-directory: src/api/js
+        run: npm ci
 
       - name: Generate Documentation (from doc directory)
         working-directory: doc
         run: |
+          source $(dirname $(which emsdk))/emsdk_env.sh
           python3 mk_api_doc.py --js --output-dir=api
 
       - name: Setup Pages