General

• Converted Theme Extensions with theme_tailor package to generate .copyWith() and .lerp() method automatically in the generated mixin.

• As the theme won't be changed too frequently, kept the generated .tailor file in the repo, it will help to build the generation quickly

[I'm ambitious about the macro things, maybe we can migrate once it's in the stable version and we can remove this tailor thing]

• Jira Ticket

Checklists

• Platform specific changes (input, image picking etc) are tested on both of the platforms (Android and iOS)
• It is tested that the UI changes are rendered correctly on different device sizes (such as long lists or expanded rows) with safe area conditions.
• Edge cases, such as responses being empty or invalid, missing data, no internet connection etc, are tested and the app works as expected.

Showcase

• Either showcase screenshots / videos are attached, or this PR does not require such any showcase.