DIY Prusa Mini bugfix-2.1.x

Author: thisiskeithb

.github/FUNDING.yml

@@ -1,3 +1,2 @@
-github: [thinkyhead]
-patreon: thinkyhead
-custom: ["https://www.thinkyhead.com/donate-to-marlin"]
+github: [thisiskeithb]
+ko_fi: thisiskeithb

.github/workflows/test-build.yml

@@ -0,0 +1,46 @@
+#
+# test-build.yml
+# Do test build to catch compile errors
+#
+
+name: DIY Prusa Mini CI
+
+on:
+  pull_request:
+    paths-ignore:
+    - config/**
+    - data/**
+    - docs/**
+    - '**/*.md'
+  push:
+    paths-ignore:
+    - config/**
+    - data/**
+    - docs/**
+    - '**/*.md'
+
+jobs:
+  test_builds:
+    name: Test Build
+    if: github.repository == 'thisiskeithb/DIY-Prusa-Mini'
+
+    runs-on: ubuntu-22.04
+
+    steps:
+    - name: Check out the PR
+      uses: actions/checkout@v4
+
+    - name: Select Python 3.x
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.9'
+        architecture: 'x64'
+
+    - name: Install PlatformIO
+      run: |
+        pip install -U platformio
+        pio upgrade --dev
+        pio pkg update --global
+
+    - name: Build Marlin
+      run: pio run