Version bumper - Able to bump multiple source paths

Allow to use configuration with multiple source path - comma separated.
Sample configuration.
`app-config.json`
```
{
"sourceUnits": [
"..\\src\\*.pas",
"..\\samples\\01-basic-demo\\Form.Main.pas"
"..\\samples\\02-employee-scorecards\\Form.Main.pas"
],
"readmeIsUpdateVersion": true,
"readmeFileName": "..\\README.md",
"readmeSearchPattern": "https://img.shields.io/badge/version"
}
```

Review the configuration handling for app-config.json and the sourceUnits setting, using the sample paths as the starting point. Done means a valid configuration can list multiple source paths and the version bumper processes them, including the README settings shown.

Written by the indexing model from the issue text.