Add pt translation

[metamaskteam003]

Description

Add pt translation

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.