feat: use favicons instead of icons

[SpecialAro]

Pre-flight Checklist

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Description of Change

Add ability to use favicons instead of default/custom icons

Motivation and Context

This fixes #1340 and fixes #257.

Issue #257 also refers:

Additionally, will be good to allow paste url of icon, additionally to current ability to upload the icon from local filesystem, because most of favicons are available via url, so we'll can get rid of the "File » Save as + Upload to Ferdium" ritual :)

This is NOT included in this PR.

This PR makes use of the Google API for favicons (https://www.google.com/s2/favicons as stated in src/helpers/favicon-helpers.ts) - let me know if there is any issue on using this.

Screenshots

Without favicon	With favicon

Checklist

• My pull request is properly named
• The changes respect the code style of the project (pnpm prepare-code)
• pnpm test passes
• I tested/previewed my changes locally

Release Notes

Added ability to use favicons instead of default/custom icons (on edit service menu)

[vraravam]

LGTM! Works great (tested locally)