Add GitHub Actions CI workflow for ProSpect

Co-authored-by: asgr <5617132+asgr@users.noreply.github.com>

Author: Copilot

.github/workflows/main.yml

@@ -0,0 +1,62 @@
+# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
+# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
+on:
+  push:
+  pull_request:
+    branches: [main, master]
+
+name: R-CMD-check
+
+jobs:
+  R-CMD-check:
+    runs-on: ${{ matrix.config.os }}
+
+    permissions:
+      contents: read
+
+    name: ${{ matrix.config.os }} (${{ matrix.config.r }})
+
+    strategy:
+      fail-fast: false
+      matrix:
+        config:
+          - {os: macOS-latest,    r: 'release'}
+          - {os: windows-latest,  r: 'release'}
+          - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
+          - {os: ubuntu-latest,   r: 'release'}
+          - {os: ubuntu-latest,   r: 'oldrel-1'}
+
+    env:
+      GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
+      R_KEEP_PKG_SOURCE: yes
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: r-lib/actions/setup-pandoc@v2
+
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          r-version: ${{ matrix.config.r }}
+          http-user-agent: ${{ matrix.config.http-user-agent }}
+          use-public-rspm: true
+
+      - uses: r-lib/actions/setup-r-dependencies@v2
+        with:
+          dependencies: '"hard"'
+          extra-packages: any::rcmdcheck,
+            github::asgr/ProSpectData@main,
+            github::asgr/Rwcs@master,
+            github::asgr/Rfits@master,
+            github::ICRAR/ProFit@master,
+            github::asgr/Highlander@master,
+            github::asgr/hyper.fit@master,
+            github::asgr/ParmOff@main,
+            any::knitr,
+            any::rmarkdown
+
+      - uses: r-lib/actions/check-r-package@v2
+        with:
+          args: 'c("--no-manual", "--as-cran")'
+          error-on: '"error"'
+          upload-snapshots: true