chore: Move handlers related code to a handlers folder in snaps-utils

[GuillaumeRx]

This PR moves the handlers related code to the handlers folder in snaps-utils to debloat the handlers.ts file.

[codecov]

Codecov Report

Attention: Patch coverage is 12.50000% with 14 lines in your changes missing coverage. Please review.

Project coverage is 94.87%. Comparing base (e90f300) to head (4a1e807).
Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
packages/snaps-utils/src/handlers/name-lookup.ts	0.00%	5 Missing ⚠️
packages/snaps-utils/src/handlers/transaction.ts	0.00%	4 Missing ⚠️
packages/snaps-utils/src/handlers/home-page.ts	0.00%	3 Missing ⚠️
packages/snaps-utils/src/handlers/settings-page.ts	0.00%	1 Missing ⚠️
packages/snaps-utils/src/handlers/signature.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3289      +/-   ##
==========================================
- Coverage   94.99%   94.87%   -0.13%     
==========================================
  Files         512      517       +5     
  Lines       11331    11333       +2     
  Branches     1747     1748       +1     
==========================================
- Hits        10764    10752      -12     
- Misses        567      581      +14     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[GuillaumeRx]

Codecov Report

Attention: Patch coverage is 12.50000% with 14 lines in your changes missing coverage. Please review.

Project coverage is 94.87%. Comparing base (e90f300) to head (4a1e807).
Report is 1 commits behind head on main.

Files with missing lines Patch % Lines
packages/snaps-utils/src/handlers/name-lookup.ts 0.00% 5 Missing ⚠️
packages/snaps-utils/src/handlers/transaction.ts 0.00% 4 Missing ⚠️
packages/snaps-utils/src/handlers/home-page.ts 0.00% 3 Missing ⚠️
packages/snaps-utils/src/handlers/settings-page.ts 0.00% 1 Missing ⚠️
packages/snaps-utils/src/handlers/signature.ts 0.00% 1 Missing ⚠️
Additional details and impacted files
☔ View full report in Codecov by Sentry. 📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

All those things were not tested before, we would need to bring JSX support in snaps-utils to cover everything as some of them validate handlers that uses Snaps UI

[FrederikBolding]

All those things were not tested before, we would need to bring JSX support in snaps-utils to cover everything as some of them validate handlers that uses Snaps UI

I believe they are all tested in snaps-execution-environments via a browser test, but not reflected in coverage. Can you verify?

[GuillaumeRx]

All those things were not tested before, we would need to bring JSX support in snaps-utils to cover everything as some of them validate handlers that uses Snaps UI

I believe they are all tested in snaps-execution-environments via a browser test, but not reflected in coverage. Can you verify?

They are indeed: https://github.com/MetaMask/snaps/blob/27f1def96ffe0779df13ab3346dbc52b11229624/packages/snaps-execution-environments/src/common/BaseSnapExecutor.test.browser.ts