chore(store): add initial version of new strongly typed createSelector

[markwhitfeld]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngxs/store/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

The current createSelector uses any in its typing and does not calculate the return type correctly.

What is the new behavior?

This PR is the first step to introducing an improvement to those typings.
The improved createSelector is added here without exporting it to enable some other concurrent work in other PRs.
There will be a separate PR that adds the type tests for this as well as replacing the previous loosely typed version.

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

[markwhitfeld]

Sorry to merge this with no review, but this is essentially a noop PR on the repo at this time.