Introduced a remainOnSelect property

[PhonicCanine]

When added to a Menu, a new "remainOnSelect" property allows the menu to remain active even after the user selects an item.
This should be particularly useful for multi-select scenarios.

[codecov]

Codecov Report

Merging #379 (0470811) into master (91ec16c) will not change coverage.
The diff coverage is 100.00%.

❗ Current head 0470811 differs from pull request most recent head 65ed0c4. Consider uploading reports for the commit 65ed0c4 to get more accurate results

@@ Coverage Diff @@## master #379 +/- ##
=======================================
Coverage 95.64% 95.64% =======================================
Files 11 11 Lines 919 919 Branches 274 274 =======================================
Hits 879 879 Misses 40 40 

Impacted Files	Coverage Δ
src/Menu.tsx	98.12% <100.00%> (ø)

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