Fix mistyped variable's names, component's names, and comments

[afsuyadi]

Description

Type of Change

• [✓] Bug fix
• Feature

Visuals

• Attached relevant screenshots / screen recording / GIF
• N/A (not a feature or no UI changes)

Testing

• Ran all E2E tests
• Ran all integration tests
• Added/updated tests for this change (if needed)
• [✓] N/A (tests not needed — explanation provided below)

Platform

Closes #10076

1. User-facing strings (high priority):
   recieve → receive
   occured → occurred

2. Component renaming (high priority):
   Renamed Seperator → Separator component
   Renamed StepSeperator → StepSeparator

3. Documentation/comments:
   necesary → necessary
   wether → whether
   the the → the
   seperator → separator in comment

4. Type definitions:
   lenght → length
   authentification → authentication

• [✓] Web
• [✓] Mobile
• [✓] Desktop

Sign-off

• [✓] QA passed
• [✓] UI/UX passed

[afsuyadi]

Hi bro @thecodrr , I have seen several mistyped words in a lot of places, which seemed kind of inconvenient. I try to fix them by opening this PR. Please take a look, thank you!