Add Tufty 2350 (.blit) build action

Now there is a source of RP2350-compatible .blits

.github/workflows/cmake.yml

diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index df4f19e..defc26c 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -57,6 +57,14 @@
             apt-packages: ccache gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib
 
           - os: ubuntu-22.04
+            pico-sdk: true
+            name: Tufty 2350 (.blit)
+            cache-key: tufty2350-bl
+            release-suffix: Tufty2350-blit
+            cmake-args: -D32BLIT_DIR=$GITHUB_WORKSPACE -DPICO_SDK_PATH=$GITHUB_WORKSPACE/pico-sdk -DPICO_BOARD=pimoroni_tufty2350 -DBLIT_EXECUTABLE_PICO_BLIT=1 -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
+            apt-packages: ccache gcc-arm-none-eabi libnewlib-arm-none-eabi libstdc++-arm-none-eabi-newlib python3-setuptools
+
+          - os: ubuntu-22.04
             name: MinGW
             cache-key: mingw
             artifact-suffix: MinGW