chore(angular): use angular project standards

[sroucheray]

As we use this libraries in our products, I'd like to offer this PR to improve a bit its support. This PR is a rework of the project structure. I backed up all files, made a clean install of Angular 12 and move back files, renaming them when they used camelCase instead of Angular default (param case) and putting them in a bit more organized folder structure.

This PR does not include any changes in the public API nor changes in the internal code itself. All none code files remain the same. package.json scripts remain the same apart from the remove of the --prod flag in the build command. Production build is now the default with Angular 12. This PR includes:

• spec file for each component, directive and service files. The coverage is still low but its a start to improve them.
• strict TS and template checking. Some of the component's input have been marked as optional (:?) to pass TS strictness, it does not change their behavior at all. Template checking revealed a little bug in the demo template that I fixed.
• partial compilation mode which is the recommended way of building Angular libraries

This PR removes:

• tslint as it is deprecated and not included by the Angular installation any more.
• protactor as it is not provided any more by Angular. But it was not used anyway.

[sroucheray]

Hi @isaacplmann,

I wanted to know if you actively maintain this repository (and I would totally understand you are not willing to) or just keep up with Angular updates. If you don't want to spend the time or if this PR does not match the goals you have with this repo could you just tell me please. I can close it and take actions on my fork.

Regards,

Stephane