Replace story tags text input with chips input

[aabounegm]

The story info editor contains a field for the story tags. It is currently a text input, but it should be converted to a chips input with autocomplete from the list of tags added by other users before for a better UX.
The lines in question are:

andax/lib/modules/story_editor/screens/info_editor.dart

Lines 150 to 163 in dbe9ee2

	TextFormField(
	decoration: const InputDecoration(
	labelText: 'Story tags',
	prefixIcon: Icon(Icons.tag_rounded),
	),
	initialValue: prettyTags(
	StoryTranslation.get(editor.translation)?.tags,
	separator: ' ',
	),
	onChanged: (s) {
	StoryTranslation.get(editor.translation)?.tags =
	s.split(' ').where((t) => t.isNotEmpty).toList();
	},
	),