new schema for softwareApplication

Closing this is prob the right call, for anyone still using this, here is re-roll of #6 against 3.0.1

Interdiff

559c559
< index 0000000..5ba1b47
---
> index 0000000..3014098
598c598
< +  public function form(array $element = []) {
---
> +  public function form(array $element = []): array {

Reopening it as we, the current maintainers, are not sure we should split it up into so separate modules.

Adding D10 compatibility (not fully tested yet, marking the module as D10 compatible so it can be installed via composer in CI for testing).