Rework component events

[DavidVollmers]

• Reworked component events to allow preventing default behaviors
• Introduce OnBlur and OnFocus events for all FocusComponentBase components
  • Due to this the protected methods OnFocus, OnFocusAsync, OnBlur and OnBlurAsync had to be renamed to OnTargetFocus, etc.

[DavidVollmers]

This will solve #42.

[codecov]

Codecov Report

Attention: 18 lines in your changes are missing coverage. Please review.

Comparison is base (8bfcd93) 42.11% compared to head (178d9a0) 41.92%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
...ackages/Ignis.Components.Web/FocusComponentBase.cs	0.00%	12 Missing ⚠️
...nd/Ignis.Components.HeadlessUI/DisclosureButton.cs	0.00%	1 Missing ⚠️
...lwind/Ignis.Components.HeadlessUI/ListboxOption.cs	0.00%	0 Missing and 1 partial ⚠️
...s/Tailwind/Ignis.Components.HeadlessUI/MenuItem.cs	0.00%	1 Missing ⚠️
...nd/Ignis.Components.HeadlessUI/RadioGroupOption.cs	0.00%	1 Missing ⚠️
...ges/Tailwind/Ignis.Components.HeadlessUI/Switch.cs	0.00%	1 Missing ⚠️
...ckages/Tailwind/Ignis.Components.HeadlessUI/Tab.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #43      +/-   ##
==========================================
- Coverage   42.11%   41.92%   -0.20%     
==========================================
  Files          82       82              
  Lines        2282     2290       +8     
  Branches      439      441       +2     
==========================================
- Hits          961      960       -1     
- Misses       1185     1193       +8     
- Partials      136      137       +1     

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