Changes

• Rename contact picker screen to invite screen
• In home screen, add fetch invites (from private channels) to pull to refresh function
• In contacts screen, use pull to refresh instead of refresh button, pull to refresh not work before, but I figure how to fix it
• When user login, also clear contacts and channels cache, close Contact list: By default user "kima" is appearing fir every user #377 Homepage: The 'Left Out' Channel is displaying again when the user login through 'Nsec' or 'Hex' private key  #391
• In profile screen, auto refetch user's profile when screen is focus, make sure alway up to date, close Profile: Profile image and display name is changing automatically on restarting the app #374
• Consistent default image, close Channel: In channel page different profile image is displaying in compare to profile #372
• Increase default item's height for flashlist, close Chat: The chat messages overlap each other for a second while loading the group chat. #369
• Update discover channels screen, move filter function to outside flashlist, fix collision error, close Channels: On scrolling down the Channels, the spacing is not consistent #353
• Update ui for invite screen
• Update some texts for consistent