feat(component-store): added custom equal option in select

[rosostolato]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngrx/platform/blob/main/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Documentation has 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?

select uses distinctUntilChanged but there was no way to provide a custom equality fn.

Closes #3931

What is the new behavior?

Added equal option to provide a custom equality function for distinctUntilChanged in select method.

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

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[timdeschryver]

LGTM. just a little nit

[markostanimirovic]

Thanks @rosostolato! The code and tests look good to me. A small suggestion for docs:

[rosostolato]

Those were great feedback! Thank you, guys!

[markostanimirovic]

LGTM 👍 Thanks @rosostolato!

[brandonroberts]

Nice work!