Use type-safe compose navigation

[ricky9667]

Description

This PR migrates the usage of navigation-compose, in order to use type safe navigation in the future.
The implementation refers to Type safety in Kotlin DSL and Navigation Compose, uses beta version 2.8.0-beta06, which will be replaced with the 2.8.0 stable version when it is released.

How to verify

1. The navigation to HomeScreen and SettingsScreen works as is.

Screenshots / Videos

N/A

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 45.74%. Comparing base (c9b3cb8) to head (e4be51a).

Files	Patch %	Lines
.../java/com/rickyhu/hushkeyboard/main/MainNavHost.kt	0.00%	12 Missing ⚠️
...main/java/com/rickyhu/hushkeyboard/main/MainApp.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #43      +/-   ##
==========================================
+ Coverage   45.67%   45.74%   +0.06%     
==========================================
  Files          36       34       -2     
  Lines         694      693       -1     
  Branches      172      172              
==========================================
  Hits          317      317              
+ Misses        299      298       -1     
  Partials       78       78              

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