Try Ubuntu CI build

Attempting to utilise code from this thread: bscotch/igor-setup#5

Author: BPzeBanshee

.github/workflows/main.yml

@@ -0,0 +1,57 @@
+name: CI for Ubuntu (TEST)
+
+on: 
+  # push: #Uncomment this line to run the workflow on push
+  workflow_dispatch: #This line allows you to run the workflow manually from the GitHub Actions page
+    #inputs:
+    #  runtime:
+    #    description: 'Target runtime'
+    #    default: 2024.1100.0.658
+    #    required: false
+  workflow_call: #This line allows you to run the workflow from another workflow
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      # Check out the repository with the GameMaker project
+      - uses: actions/checkout@v4
+        with:
+          lfs: true
+      # This step finds the yyp file in the repository and saves the path to an output
+      - id: find_yyp
+        name: Find the yyp file
+        run: |
+          yyp=$(find ${{ github.workspace }} -name "*.yyp")
+          echo "YYP file found at: $yyp"
+          echo "yyp-path=$yyp" >> $GITHUB_OUTPUT
+      - name: Set up ffmpeg # This step may be removed when https://github.com/YoYoGames/GameMaker-Bugs/issues/4977 is fixed
+        uses: FedericoCarboni/setup-ffmpeg@v3
+        with:
+          ffmpeg-version: '6.1.0'
+      # This step sets up the GameMaker build CLI tool Igor https://github.com/bscotch/igor-setup
+      - name: use Igor Setup
+        uses: bscotch/igor-setup@develop
+        id: igor
+        with:
+          target-yyp: ${{ steps.find_yyp.outputs.yyp-path }}
+          access-key: ${{ secrets.ACCESS_KEY }} # To generate your Access Key, check out the Access Key section of the GameMaker Manual's Building via Command Line page: https://manual.gamemaker.io/monthly/en/#t=Settings%2FBuilding_via_Command_Line.htm
+          cache: true
+          runtime-version: ${{ inputs.runtime }}
+          modules: linux
+      # This step uses Igor to build the GameMaker project https://github.com/bscotch/igor-build
+      - name: use Igor build
+        uses: bscotch/igor-build@v1
+        id: build
+        with:
+          yyp-path: ${{ steps.find_yyp.outputs.yyp-path }}
+          user-dir: ${{ steps.igor.outputs.user-dir }}
+          platform: linux
+      # This step uploads the build to the artifacts, so you can download it from the GitHub Actions page or use it in another workflow
+      - name: upload-build
+        uses: actions/upload-artifact@v4
+        with:
+          name: igor-build-${{ runner.os }}
+          path: ${{ steps.build.outputs.out-dir }}
+          retention-days: 1 # Longer retention days can incur additional charges. See https://docs.github.com/en/actions/using-workflows/storing-workflow-data-as-artifacts
+