GPUI on the web (#50228)

Implements a basic web platform for the wasm32-unknown-unknown target
for gpui

Release Notes:

- N/A *or* Added/Fixed/Improved ...

---------

Co-authored-by: John Tur <john-tur@outlook.com>

.github/workflows/run_tests.yml

@@ -466,6 +466,45 @@ jobs:
       run: |
         rm -rf ./../.cargo
     timeout-minutes: 60
+  check_wasm:
+    needs:
+    - orchestrate
+    if: needs.orchestrate.outputs.run_tests == 'true'
+    runs-on: namespace-profile-8x16-ubuntu-2204
+    steps:
+    - name: steps::checkout_repo
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
+      with:
+        clean: false
+    - name: steps::setup_cargo_config
+      run: |
+        mkdir -p ./../.cargo
+        cp ./.cargo/ci-config.toml ./../.cargo/config.toml
+    - name: steps::cache_rust_dependencies_namespace
+      uses: namespacelabs/nscloud-cache-action@v1
+      with:
+        cache: rust
+        path: ~/.rustup
+    - name: run_tests::check_wasm::install_nightly_wasm_toolchain
+      run: rustup toolchain install nightly --component rust-src --target wasm32-unknown-unknown
+    - name: steps::setup_sccache
+      run: ./script/setup-sccache
+      env:
+        R2_ACCOUNT_ID: ${{ secrets.R2_ACCOUNT_ID }}
+        R2_ACCESS_KEY_ID: ${{ secrets.R2_ACCESS_KEY_ID }}
+        R2_SECRET_ACCESS_KEY: ${{ secrets.R2_SECRET_ACCESS_KEY }}
+        SCCACHE_BUCKET: sccache-zed
+    - name: run_tests::check_wasm::cargo_check_wasm
+      run: cargo +nightly -Zbuild-std=std,panic_abort check --target wasm32-unknown-unknown -p gpui_platform
+      env:
+        CARGO_TARGET_WASM32_UNKNOWN_UNKNOWN_RUSTFLAGS: -C target-feature=+atomics,+bulk-memory,+mutable-globals
+    - name: steps::show_sccache_stats
+      run: sccache --show-stats || true
+    - name: steps::cleanup_cargo_config
+      if: always()
+      run: |
+        rm -rf ./../.cargo
+    timeout-minutes: 60
   check_dependencies:
     needs:
     - orchestrate
@@ -641,6 +680,7 @@ jobs:
     - run_tests_mac
     - doctests
     - check_workspace_binaries
+    - check_wasm
     - check_dependencies
     - check_docs
     - check_licenses
@@ -668,6 +708,7 @@ jobs:
         check_result "run_tests_mac" "${{ needs.run_tests_mac.result }}"
         check_result "doctests" "${{ needs.doctests.result }}"
         check_result "check_workspace_binaries" "${{ needs.check_workspace_binaries.result }}"
+        check_result "check_wasm" "${{ needs.check_wasm.result }}"
         check_result "check_dependencies" "${{ needs.check_dependencies.result }}"
         check_result "check_docs" "${{ needs.check_docs.result }}"
         check_result "check_licenses" "${{ needs.check_licenses.result }}"