Translating EasyRPG Editor

Adding a language

Add the file with corresponding language code (e.g. "es") to CMakeLists.txt:
```
set(TRANSLATION_SOURCES
  [...]
  translations/editor_es.ts
)
```

Add the name to translations/editor.qrc

<qresource prefix="/i18n">
  [...]
  <file alias="easyrpg-editor_es.qm">editor_es.qm</file>
</qresource>

Run cmake --build --target translations if you have a build tree ready.

Or invoke lupdate manually from root directory of the repository: lupdate src -ts translations/editor_es.ts

(Further) translating an already added language

Open translations/editor_<lang>.ts in Qt Linguist
Translate strings and save file

💡
There are good external tutorials.
Commit to git repository and make a pull request

Running Editor in a specific language for testing

Build Editor in Debug configuration
Compile the translation file (QM format) with lrelease or CMake
Set environment variable EASYRPG_EDITOR_LANG_FILE to the desired file, e.g.
```
env EASYRPG_EDITOR_LANG_FILE=test.qm easyrpg-editor
```