feat: ability to enable or disable builtin folding range provider

[lifeart]

els.local.useBuiltinFoldingRangeProvider can be true or false, enabled by default

[codecov]

Codecov Report

Merging #364 (e20bd92) into component-context-info-origin (645c300) will decrease coverage by 0.10%.
The diff coverage is 41.66%.

@@                        Coverage Diff                        @@
##           component-context-info-origin     #364      +/-   ##
=================================================================
- Coverage                          71.63%   71.53%   -0.11%     
=================================================================
  Files                                 55       55              
  Lines                               4548     4560      +12     
  Branches                             892      895       +3     
=================================================================
+ Hits                                3258     3262       +4     
- Misses                              1288     1296       +8     
  Partials                               2        2              

Impacted Files	Coverage Δ
src/folding-provider/entry.ts	84.78% <37.50%> (-12.59%)	⬇️
src/server.ts	64.15% <50.00%> (-0.18%)	⬇️

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