Support for iPadOS (16) + macOS Ventura (#70)

* feat: first ever version that barely supports iPadOS

* feat: fixed sidebar toolbar items position

* feat: updated CacheService to support iPadOS

* feat: replaced UISearchTextField with UISearchBar in SearchField

* feat: improved sidebar UI for iPadOS

* fix: removed usage of NavigationSplitView, it's or bugged or i need to update my code for it

* feat: improved folders UI on iPad
and also made the toolbar translucent instead of transparent

* Update README.md

* fix: FolderItemView horizontal layout

* fix: cache database intial start on iPadOS

* fix: surrounded UINavigationBarAppearance code with #if os(iOS)

* fix: chat list item photo not being vertically centered

* feat: nearly finished iPadOS UI
Every change listed here is exclusive for iPadOS:
- replaced usage of UISearchBar with .searchable
- replaced ScrollView + LazyVStack with List
- removed tab selection in the toolbar (will be replaced by a better solution)
- improved folders layout

* feat: updated target settings
- status bar hidden = treue
- all orientations enabled

* chore: bump build number

* chore: slight README update

* feat: a lot of improvements
- improved folder bar design
- a ton of improvements to code readability and effectiveness

* fix: scroll to end in chat

* feat: added animation for ChatSplitView closing and opening

* feat: added an actual iPad icon

* fix: message bubble color on iPadOS in light mode

* feat: optimized FolderItemView

* fix: scroll to end on sending new message

* feat: make folder items and chat items buttons

* feat: improved ChatItemView layout

* feat: replaced List with ScrollView + LazyVStack back

* feat: improved folder bar UI
also fixed a minor padding issue for the chat list

* feat: yea even more design improvements boisss

* feat: created the tab bar, made it possible to resize the sidebar programmatically

* fix: ChatItemView layout

* feat: started implementing settings for iPadOS

* feat: code optimizations

* fix: swiftlint excluded files

* feat: set used Xcode version in README to Xcode 14 beta 1

* feat: kinda works

* feat: finished preferences for iPadOS
well, partially, the UI is a little wacky but I have no idea how to fix it

* refactor: renamed Preferences to Settings

* feat: started implementing vertical folders for iPadOS
btw horizontal folders for macOS are also coming, knowing that I made them for iPadOS

* feat: added illustrations for vertical and horizontal folder layouts

* refactor: renamed Preferences to Settings in remaining places

* fix: made sidebarSize modifier platform-agnostic

* feat: started implementing settings for folder layout

* docs: moved images folder to .github

* docs: updated INSTALLATION.md

* feat: created DefaultKeys file for storing UserDefaults keys

* feat: added support for different folder layouts on macOS and iPadOS

* fix: navigation bar appearance is now only set for the chat view

* fix: tab bar visibility

* feat: improved folder bar design for the horizontal layout on iPadOS

* fix: build on macOS

* chore: improvements and bugfixes here and there

* feat: implemented send button for touch devices

* fix: border of the scroll down button on iPadOS

* fix: tab item colors in dark mode

* feat: added a button to close the keyboard on iPadOS

* feat: input field improvements
- fixed multiline and long messages for iPadOS 16 and macOS Ventura
- added send button for macOS

* chore: bump build number to 7

* feat: created MultilineTextField just for the future

* fix: crash on opening Accounts settings tab

* fix: first name text field basically worked as the last name one

* fix: minor fixes in the account settings pane

Author: voltangle