Update information for translating the interface with Crowdin

[seanbudd]

Link to issue number:

Closes #16656

Summary of the issue:

NV Access is intending to move most of the wiki into the repository, so changes are tracked better and easier to propose. The documentation for translating NVDA is very dated, particularly since the update of the translation system.

Description of user facing changes

This wiki page was moved and updated in the project docs

• Translating the interface

The following changes were made to update the contents:

• grammar and formatting fixes
• add reference to user guide commands for PoEdit
• remove section on translating using a text editor
• added information on:
  • on using Crowdin and proofreader status
  • plural forms
  • pgettext (context/tags)

Future work

This wiki pages will be removed/deprecated when this PR is merged. Moving and updating the rest of the translating wiki pages.

Summary by CodeRabbit

• Documentation

  • Added a new guide for translating the NVDA interface using Crowdin.
  • Enhanced translation readme with improved formatting and updated references.

• Chores

  • Updated links in translation files to direct to the new Crowdin documentation.