fix(theme): support all TOML date and time variants

[eduardoapatat]

Summary

Extend the existing TOML date highlighting rule to cover every date and time
variant emitted by Even Better TOML's TextMate grammar:

• Offset date-time
• Local date-time
• Local date
• Local time

All variants now use the existing Catppuccin pink palette color.

Motivation

The theme previously targeted only
constant.other.time.datetime.offset.toml.

The other valid TOML date and time scopes fell back to the generic source
foreground color:

• constant.other.time.datetime.local.toml
• constant.other.time.date.toml
• constant.other.time.time.toml

Testing

Tested using Catppuccin Mocha and Even Better TOML in the Extension Development
Host.

• Verified each scope with Developer: Inspect Editor Tokens and Scopes
• Confirmed all four variants use the existing TOML date color
• Ran pnpm lint successfully

Screenshots

Before

After