On Wayland, provide option for better CSD

While most compositors provide server side decorations, the GNOME
does not, and won't provide them. Also Wayland clients must render
client side decorations.

Winit was already drawing some decorations, however they were bad
looking and provided no text rendering, so the title was missing.
However this commit makes use of the SCTK external frame similar to
GTK's Adwaita theme supporting text rendering and looking similar to
other GTK applications.

Fixes #1967.

.github/workflows/ci.yml

@@ -42,6 +42,7 @@ jobs:
     env:
       RUST_BACKTRACE: 1
       CARGO_INCREMENTAL: 0
+      PKG_CONFIG_ALLOW_CROSS: 1
       RUSTFLAGS: "-C debuginfo=0 --deny warnings"
       OPTIONS: ${{ matrix.platform.options }}
       FEATURES: ${{ format(',{0}', matrix.platform.features ) }}
@@ -62,9 +63,12 @@ jobs:
         rust-version: ${{ matrix.rust_version }}${{ matrix.platform.host }}
         targets: ${{ matrix.platform.target }}
 
+    - name: Install Linux dependencies
+      if: (matrix.platform.os == 'ubuntu-latest')
+      run: sudo apt-get update && sudo apt-get install pkg-config cmake libfreetype6-dev libfontconfig1-dev
     - name: Install GCC Multilib
       if: (matrix.platform.os == 'ubuntu-latest') && contains(matrix.platform.target, 'i686')
-      run: sudo apt-get update && sudo apt-get install gcc-multilib
+      run: sudo dpkg --add-architecture i386 && sudo apt-get update && sudo apt-get install g++-multilib gcc-multilib libfreetype6-dev:i386 libfontconfig1-dev:i386
     - name: Install cargo-apk
       if: contains(matrix.platform.target, 'android')
       run: cargo install cargo-apk