ci: add build toolchain and project on mac

Add toolchain build workflow to build toolchain on macos host. It is
triggered by workflow dispatch event.
Add nightly build every 24 hours at 2 AM UTC+1 of ia32-generic-qemu
target on macos host.
Disable Azure SDK port on ia32-generic-qemu target due to compile
errors.

JIRA: CI-158

.github/workflows/build-toolchain.yml

@@ -0,0 +1,35 @@
+name: Build toolchain
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build-macos:
+    name: build-macos-toolchain
+    runs-on: macos-12
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Install denependecies
+        run: |
+          brew install bash coreutils autoconf automake genext2fs make wget gnu-sed
+          echo "$(brew --prefix make)/libexec/gnubin" >> $GITHUB_PATH
+          echo "$(brew --prefix gnu-sed)/libexec/gnubin" >> $GITHUB_PATH
+
+      - name: Build toolchain
+        run: |
+          mkdir ~/toolchain
+          git rev-parse --short HEAD > ~/toolchain/git-version
+          cd phoenix-rtos-build/toolchain/
+          ./build-toolchain.sh i386-pc-phoenix "$HOME"/toolchain/
+          # upload/download-artifact action don't preserve permissions and compresses to zip. Pack to archive and don't compress.
+          tar -C ~/toolchain -cvf ~/i386-pc-phoenix-macos.tar i386-pc-phoenix git-version
+
+      - name: Upload toolchain artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: i386-pc-phoenix-macos
+          path: ~/i386-pc-phoenix-macos.tar

.github/workflows/nightly.yml

@@ -0,0 +1,58 @@
+name: Nightly
+
+on:
+  schedule:
+    - cron: '0 1 * * *'   # everyday at 02:00 UTC+1
+  workflow_dispatch:
+
+jobs:
+  build-macos:
+    name: build-macos
+    runs-on: macos-12
+    strategy:
+      matrix:
+        target: [ia32-generic-qemu]
+        include:
+          - toolchain: i386-pc-phoenix
+
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Install denependecies
+        run: |
+          brew install bash coreutils autoconf automake genext2fs make wget gnu-sed
+          echo "$(brew --prefix make)/libexec/gnubin" >> $GITHUB_PATH
+          echo "$(brew --prefix gnu-sed)/libexec/gnubin" >> $GITHUB_PATH
+
+      - name: Download toolchain
+        # TODO: download from github packages/releases
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          workflow: build-toolchain.yml
+
+      - name: Install toolchain
+        working-directory: ${{ matrix.toolchain }}-macos
+        run: |
+          tar -xvf ${{ matrix.toolchain }}-macos.tar
+          echo "$(pwd)"/${{ matrix.toolchain }}/bin >> $GITHUB_PATH
+
+      - name: Build
+        run: ./phoenix-rtos-build/build.sh all tests
+        env:
+          TARGET: ${{ matrix.target }}
+
+      - name: Tar rootfs
+        working-directory: _fs
+        run: tar -cvf ../rootfs-${{ matrix.target }}.tar ${{ matrix.target }}/root
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: phoenix-rtos-${{ matrix.target }}-macos-host
+          path: |
+            _boot/${{ matrix.target }}
+            rootfs-${{ matrix.target }}.tar
+