chore: add typecheck script and enable strict type checking

[thkruz]

Proposed changes

The project had no type-checking step. ESLint is configured with typescript-eslint's recommended ruleset, which only runs syntactic lint rules; it performs no type-checking and there was no tsc invocation anywhere in the npm scripts. As a result, type errors were never caught by npm run lint, CI, or any other command.

Types of changes

It is an adjustment to the build/development process, not a modification to the production code.

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to change).

Checklist:

• [ x] I have read the CONTRIBUTING document.
• [ x] My commit messages follows the conventional commit format
• My change requires a change to the documentation, and updated it accordingly.
• I have added tests to cover my changes.
• [x ] All new and existing tests passed.

[wuda-io]

I had in mind, that the building didn't complete with strict type checking. Can you confirm that the building is working fine after this strict checks? thanks

[gselderslaghs]

@wuda-io correct, I made a quick dry-run on this merge request and it turned out there is additional refactoring needed based on strict-type checking within the codebase before this improvement can be merged into dev and main branches

@thkruz eventually you can create an issue describing this pull request describing what is needed to fully complete this improvement feature, as a result a follow up merge implementing strict-type checking within the codebase can be foreseen to provide a complete validation on this improvement merge-request