feat(ramp): popular region and search states

[wachunei]

Description

This PR improves the Region selector for Ramp flows by removing duplicate code and adding these features:

1. Default list is now shown in sections (Popular Regions and Regions)
2. Searching will also match and display states

Related issues

Fixes: #

Manual testing steps

1. Go to Ramp flow
2. Open a Region modal (Region or Amount screens)
3. Confirm the changes from descriptions

Screenshots/Recordings

Before

After

Pre-merge author checklist

• I’ve followed MetaMask Coding Standards.
• I've clearly explained what problem this PR is solving and how it is solved.
• I've linked related issues
• I've included manual testing steps
• I've included screenshots/recordings if applicable
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.
• I’ve properly set the pull request status:
  • In case it's not yet "ready for review", I've set it to "draft".
  • In case it's "ready for review", I've changed it from "draft" to "non-draft".

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[codecov-commenter]

Codecov Report

Attention: 26 lines in your changes are missing coverage. Please review.

Comparison is base (71321b3) 37.46% compared to head (70571f8) 37.45%.

Files	Patch %	Lines
...mponents/UI/Ramp/common/components/RegionModal.tsx	31.42%	15 Missing and 9 partials ⚠️
app/components/UI/Ramp/common/sdk/index.tsx	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7899      +/-   ##
==========================================
- Coverage   37.46%   37.45%   -0.02%     
==========================================
  Files        1052     1052              
  Lines       28202    28224      +22     
  Branches     2517     2524       +7     
==========================================
+ Hits        10566    10571       +5     
- Misses      17037    17048      +11     
- Partials      599      605       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[github-actions]

E2E test started on Bitrise: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/1a7b02be-03d2-420a-af67-734adf8ed4e9
You can also kick off another Bitrise E2E smoke test by removing and re-applying the (Run Smoke E2E) label

[bkirb]

@wachunei LGTM I verified this change for regions ✅

[wachunei]

@bkirb can you quickly verify again? by self reviewing I found an issue and I added a fix to avoid recomputing the fuzzy search engine on every keystroke

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
4 Code Smells

50.8% Coverage
0.0% Duplication

[sethkfman]

LGTM

[bkirb]

@wachunei LGTM I verified with the latest changes ✅