(gha) Add the beginnings of a github actions pipeline

for pr testing. Perform a shellcheck, then test that the agent
installation task runs on latest ubuntu.

Author: jpartlow

.github/workflows/pr_testing.yaml

@@ -0,0 +1,40 @@
+---
+name: 'PR Tests'
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  shellcheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Install ShellCheck
+        run: sudo apt-get install shellcheck
+      - name: Run ShellCheck
+        run: shellcheck tasks/*.sh
+
+  test-install-task-on-ubuntu:
+    runs-on: ubuntu-latest
+    needs: shellcheck
+    steps:
+      - uses: actions/checkout@v4
+      #      - name: Install dependencies
+      #        run: sudo apt wget
+      - name: Install Bolt
+        run: |-
+          wget https://apt.puppet.com/puppet-tools-release-noble.deb
+          sudo dpkg -i puppet-tools-release-noble.deb
+          sudo apt update
+          sudo apt install -y puppet-bolt
+      - name: Install module dependencies
+        run: bolt module install
+      - name: Run openvox-agent install task
+        run: bolt task run openvox_bootstrap::install --targets localhost
+      - name: Verify openvox-agent is installed
+        run: puppet --version