Add FAQ

[F43nd1r]

What: Add a FAQ section to the docs. Move kotlin-spring-plugin docs there and add section for GenericFilterBean.

Why: Streamline setup guide, document GenericFilterBean workaround.
Wontfix:
Closes #261
Closes #149
Closes #205

How:
Add new docs section

Checklist:

• Documentation added
  
• N/A Changelog updated
  
• N/A Tests added
  
• Ready to be merged
  

[codecov-commenter]

Codecov Report

Merging #276 (f566eaa) into main (52ff01d) will increase coverage by 0.62%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main     #276      +/-   ##
============================================
+ Coverage     75.32%   75.94%   +0.62%     
- Complexity      400      403       +3     
============================================
  Files            80       80              
  Lines          1086     1085       -1     
  Branches         68       68              
============================================
+ Hits            818      824       +6     
+ Misses          223      219       -4     
+ Partials         45       42       -3     

Impacted Files	Coverage Δ
...le/chaos/monkey/chaosdemo/RouterConfiguration.java	100.00% <0.00%> (ø)
...ring/boot/chaos/monkey/assaults/MemoryAssault.java	92.85% <0.00%> (+10.00%)	⬆️

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[WtfJoke]

Great, thanks! LGTM 📜