(WIP) Splash screen: move it into React

[Disti4ct]

Checklist

• I have read the CONTRIBUTING guide
• Good naming (as clear and simple as possible)
• Correct behavior if external API endpoints are down, return 404, 504 (or no answer), 401 errors (ddos simulation)
• I tested desktop/mobile resolution
• I tested light/dark theme
• I tested different languages
• I checked the functionality once again (AFFECT MONEY)
• I checked the PR once again

Original issue

#4069
#3531
#3511

Video / screenshot proof

videoTestSmall.mp4

Resolutions

320px

375px

414

px

540

px

768

px

1024

px

[sorentobot]

builded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[sorentobot]

commit 9b48d74 rebuilded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[sorentobot]

commit eda1aa3 rebuilded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[iower]

Thoughts about naming

splash screen = screen with the preloader (see definition)
this screen = screen with these buttons

this naming variants:

• first screen
• init screen
• start screen
• start page - I think the best one, can be pronounced as стартовая страница or just стартовая. It's as simple as possible, everyone can understand it.

Suggestion

SplashScreen -> StartPage

[sorentobot]

commit 8cff0be rebuilded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[sorentobot]

commit f81529a rebuilded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[noxonsu]

нужно дальше выдрачивать, т.к. это первое впечатление у юзера

• картинки перенести в прелоадер тогда
• настройку картинок и текстов вынести в window опции (т.к. захотят их менять клиенты плагинов)

[sorentobot]

commit 1d11892 rebuilded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[sorentobot]

commit c031d6a rebuilded https://testnet4200.swaponline.site https://mainnet4200.swaponline.site

[Disti4ct]

More simple way -> #4212