fix(DarkThemeToggle): should toggle the theme with usePreferences is false (#417)

[XavierChevalier]

Description

The DarkThemeToggle component's button is now working when usePreferences=true.

Fixes #417

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

• it should toggle the theme with usePreferences is false

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

[Bloodysunset]

Upon review, it seems that the dark theme components were a bit sloppy and overly complicated.

This seems to fix the problem and make it easier to read and understand what is going on in the ThemeContext. Thank you!

[codecov]

Codecov Report

Base: 98.48% // Head: 98.55% // Increases project coverage by +0.06% 🎉

Coverage data is based on head (3370088) compared to base (6ea90f1).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #424      +/-   ##
==========================================
+ Coverage   98.48%   98.55%   +0.06%     
==========================================
  Files         102      102              
  Lines        4300     4280      -20     
  Branches      388      387       -1     
==========================================
- Hits         4235     4218      -17     
+ Misses         65       62       -3     

Impacted Files	Coverage Δ
src/lib/components/Flowbite/ThemeContext.tsx	92.30% <100.00%> (+1.71%)	⬆️

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[rluders]

Thanks folks.