Manage translations

Requirements

Qt Linguist tools are used to manage translations. Typically on Ubuntu:

sudo apt install qttools5-dev-tools

Generate the plugin_translation.pro file:

python scripts/generate_translation_profile.py

Update .ts files:

pylupdate5 -noobsolete -verbose gn_tools/resources/i18n/plugin_translation.pro

Translate your text using QLinguist or directly into .ts files. Launching it through command-line is possible:
```
linguist gn_tools/resources/i18n/*.ts
```
Compile it:
```
lrelease gn_tools/resources/i18n/*.ts
```

Remember that the resulting *.qm file should not be tracked in git history since it's autogenerated and a binary file. The CI/CD pipeline will take care of generating it and packaging it. However, you can add the *.qm file to .gitignore to avoid any accidental commits.
The pylupdate5 command is used to extract translatable strings from the source code and update the .ts files accordingly.
The -no-obsolete flag is important to avoid removing obsolete translations, which can be useful for maintaining the history of translations and ensuring that no existing translations are lost during updates.
The -verbose flag is used to provide detailed output during the translation update process, which can be helpful for debugging and ensuring that the process is working correctly.
The linguist command is used to launch the Qt Linguist application, which provides a graphical interface for translating the .ts files. This can be more user-friendly than editing the files directly in a text editor.
The lrelease command is used to compile the .ts files into .qm files, which are binary files used by Qt applications for translations.