docs: supported wallets are sorted alphabetically

[metamaskteam002]

Description

Supported wallets are now sorted alphabetically for easier and more convenient browsing.

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings

Type of change.

• [x] DOCS - a PR of this type introduces DOCS improvement.