Add search feature

[hernanmd]

This PR includes the first implementation of a live search in the New Settings Browser.

Details

• It works by configuring a results tree, similar to the whole settings tree, based on the typed search input.
• The minimum number of characters to start a search is currently 3, but could be easily made configurable.
• It also auto-selects the first tab on setting category selection. Fixes StSettingsApplication should select the first pane when we select a topics pharo-project/pharo#17206
• Setting node search was enhanced by querying each node label by substrings, then lowercase each one and comparing it against the lowercase input pattern.

[hernanmd]

There is a single failing test in the NewTools-Pharo integration but it seems unrelated ReflectivityControlTest>>#testLinkOneShot and I cannot reproduce it in the UI image: