Add Find Functionality

There is related to a Draft MR to implement a Find functionality.

It's particularly useful to find and replace placeholders in templates (such as the <feature-flag-name> ).

find-and-replace.mp4

Slack thread: https://gitlab.slack.com/archives/C0NFPSFA8/p1724938895922889

Implementation plan

Please take a look at the Parent Epic for the plan.