feat: support overriding i18n

[LucasXu0]

No description provided.

[codecov]

Codecov Report

Attention: 27 lines in your changes are missing coverage. Please review.

Comparison is base (89b93d8) 80.31% compared to head (3fa46ed) 80.33%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #550      +/-   ##
==========================================
+ Coverage   80.31%   80.33%   +0.02%     
==========================================
  Files         282      284       +2     
  Lines       12068    12153      +85     
==========================================
+ Hits         9692     9763      +71     
- Misses       2376     2390      +14     

Files	Coverage Δ
...ent/divider_block_component/divider_menu_item.dart	25.00% <100.00%> (ø)
...ent/image_block_component/image_upload_widget.dart	78.66% <100.00%> (ø)
...tor/block_component/standard_block_components.dart	100.00% <100.00%> (ø)
...t/table_block_component/table_block_component.dart	54.90% <100.00%> (ø)
...tyle/mobile_text_span_decorator_for_attribute.dart	87.87% <100.00%> (ø)
lib/src/editor/l10n/appflowy_editor_l10n.dart	100.00% <100.00%> (ø)
.../editor/selection_menu/selection_menu_service.dart	76.28% <100.00%> (ø)
...lbar/desktop/items/bulleted_list_toolbar_item.dart	77.77% <100.00%> (ø)
...itor/toolbar/desktop/items/color/color_picker.dart	67.18% <100.00%> (ø)
...ktop/items/color/highlight_color_toolbar_item.dart	62.50% <100.00%> (ø)
... and 20 more

... and 4 files with indirect coverage changes

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.