Edit localisation from the project tree in a dedicated tab

Edit project translations in a dedicated Localisation tab in the main Studio workspace.

Add a Localisation item beneath each project in the Solution Navigator. Opening it shows the project's translation table in an editor tab alongside code and designers. Keep all translation languages together so developers can compare values side by side and switch between translations, code, and interface design without reopening or resizing Project Settings.

Retain default and supported locale controls, adding/removing translation locales and keys, multiline translated values, validation and missing-translation warnings, and JSON import/export. Changes participate in normal project saving and undo/redo. Existing localisation entry points should open the same editor.

This gives translation work a visible home and more usable editing space, especially for applications with several languages or many strings.