Add --no-overwrite Option to Translation Import Command

[lvdigitalaaank]

Problem Statement

Currently, the import process overwrites all entries in the phrases table, regardless of whether they have been modified via the UI. The --fresh flag controls whether the table is cleared before import, but even without it, existing entries are always updated.

Proposed Solution

• Introduce a new option, --no-overwrite, to the import command. When enabled, the import process should:
• Only create new entries that do not exist in the phrases table.
• Skip updating existing entries to preserve UI-modified data.

Benefits

• Prevents loss of manual modifications made via the UI.
• Allows importing new translations without affecting existing ones.
• Provides more flexibility for managing translations in different workflows.

Integration in SyncPhrasesAction::execute
The SyncPhrasesAction::execute method should check if the overwrite variable is set, default should be true, If not, instead of calling updateOrCreate(), it should only call create() if the entry does not already exist.

execute(Translation $source, $key, $value, $locale, $file, $ovewrite = true)

Modify ImportTranslationsCommand to accept the --no-overwrite flag and pass it to SyncPhrasesAction::execute