[Feature] Disable XML RPC endpoint by default

[titouanmathis]

XML-RPC is an old feature of WordPress, mainly targeted by bots. It can be disabled by default.

See https://kinsta.com/blog/xmlrpc-php/.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (7f2342f) 61.34% compared to head (34a756b) 64.37%.

❗ Current head 34a756b differs from pull request most recent head 3146b9c. Consider uploading reports for the commit 3146b9c to get more accurate results

Additional details and impacted files

@@              Coverage Diff              @@
##             develop      #21      +/-   ##
=============================================
+ Coverage      61.34%   64.37%   +3.03%     
- Complexity       150      152       +2     
=============================================
  Files              7        7              
  Lines            388      393       +5     
=============================================
+ Hits             238      253      +15     
+ Misses           150      140      -10     

Flag	Coverage Δ
unittests	64.37% <100.00%> (+3.03%)	⬆️

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Files	Coverage Δ
src/Managers/CleanupManager.php	37.25% <100.00%> (+28.55%)	⬆️

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