feat(locale): Enhance ms-my (Malay) locale

[harithilmi]

This update includes three main improvements:

1. Added meridiem Function:

   • Implements a meridiem function based on the standard Malaysian time blocks (e.g., pagi, tengah hari, petang, malam).
   • Supports both full (A token) and short (a token) formats:
     • h:mm A → 3:30 petang
     • h:mm a → 3:30 ptg

2. Updated Default formats:

   • Updates the LT, LLL, and LLLL formats to use the 12-hour clock and the new meridiem function by default. This makes the locale's output more natural and practical for everyday use.
     • LLL → 24 Oktober 2025, 3:30 petang