add action that tests capitalization of helpfiles and qml files, and NAMESPACE exports

[vandenman]

Part of jasp-stats/INTERNAL-jasp#1635

The bash script verify-capitalization-helpfile-qml-files.sh does the following:

1. parse all R functions listed in inst/Description.qml and put this in FUNCTIONS.
2. for FUN in FUNCTIONS test that:
   1. The NAMESPACE contains export($FUN).
   2. There exists a qml file called $FUN.qml.
   3. There either is no help file, or the helpfile matches $FUN.md (or .html).

This does not test translated help files (e.g., Descriptives-nl.md) because those filenames are autogenerated as far as I know.

Example runs:

• Descriptives
• TTests
• NetworkAnalysis

Example .yml that should be added to all repositories as an action:

on: 
  push:
    paths: ['**.R', 'NAMESPACE', '**.md', '**.html', '**.qml', 'inst/Description.qml']
  pull_request:
    paths: ['**.R', 'NAMESPACE', '**.md', '**.html', '**.qml', 'inst/Description.qml']

name: test-capitalizations

jobs:
  verify-capitalizations:
    runs-on: ubuntu-latest
  
    env:
      GITHUB_TOKEN: ${{ secrets.REPO_KEY }}

    steps:    
      - uses: actions/checkout@v2
      - uses: jasp-stats/jasp-actions/test-capitalizations@verify-capitalization-helpfiles

[amirmasoudabdol]

I was thinking that you would implement this as part of the unit-testing stage at the R side, which would have been easier. But, I guess this is easier and more general.

[amirmasoudabdol]

If you are sure that the regex works, then this looks good to me! I have tested it on jaspCircular and had the problem that I have mentioned.