feat: life quality improvements

[rluders]

Description

This PR adds a few changes, most of them related to my usage experience.

• Adds iconLight and iconDark as optional props to DarkThemeToggle component;
• Fixes the theme component props for Navbar component;
• Adds access to the listItem element to the SidebarItem theme;
• Excludes lib/**/* from vitest, it seems that only excluding lib in this case wasn't actually working well...

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Breaking changes

Navbar component now access the correct theme interface, and it could break any customization for this component. The new format is visible in the documentation.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Existing unit tests still working
• Local testing (a separated project that uses flowbite-react)

Test Configuration:

Not relevant.

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

[vercel]

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Name	Status	Preview	Comments	Updated (UTC)
flowbite-react	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 25, 2023 7:09pm

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (7461173) 99.54% compared to head (1fc1e29) 99.54%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #825   +/-   ##
=======================================
  Coverage   99.54%   99.54%           
=======================================
  Files         163      163           
  Lines        6621     6628    +7     
  Branches      401      404    +3     
=======================================
+ Hits         6591     6598    +7     
  Misses         30       30           

Impacted Files	Coverage Δ
src/components/DarkThemeToggle/DarkThemeToggle.tsx	100.00% <100.00%> (ø)
src/components/Navbar/Navbar.tsx	100.00% <100.00%> (ø)
src/components/Navbar/NavbarToggle.tsx	100.00% <100.00%> (ø)
src/components/Sidebar/SidebarItem.tsx	100.00% <100.00%> (ø)
src/components/Sidebar/theme.ts	100.00% <100.00%> (ø)

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[rluders]

I just need to fix one thing for the docs, that I notice when Vercel tried to deploy it. DONE

[rluders]

I need these changes ASAP, so... I'm getting it merged arbitrarily.