This was removed in #63481, and we confirmed that it's better like this,
but we add back the possibility to strip CR as an option, to optionally
restore the previous behavior.
For performance this is done directly in `String::parse_utf8`.
Also fixes Android `FileAccess::get_line()` as this one _should_ strip CR.
Supersedes #63717.
* Adds `indent(str)` to `String`:
* Indent the (multiline) string with the given indentation.
* This method is added in order to keep the translated XML correctly
indented.
* Moves the loading of tool/doc translation into
`editor/editor_translation.{h,cpp}`.
* This will be used from both `EditorSettings` and the doc tool from
`main`.
* Makes use of doc translation when generating XML class references, and
setup the translation locale based on `-l LOCALE` CLI parameter.
The XML class reference won't be translated if `-l LOCALE` parameter is
not given, or when it's `-l en`.
