feat: add core/compilers packages

[eddycharly]

Explanation

Add core/compilers packages.

[codecov]

Codecov Report

Attention: Patch coverage is 61.97183% with 27 lines in your changes missing coverage. Please review.

Project coverage is 23.89%. Comparing base (183fe67) to head (4adb693).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/core/compilers/cel/cel.go	57.14%	8 Missing and 4 partials ⚠️
pkg/core/assertion/assertion.go	0.00%	3 Missing ⚠️
pkg/core/compilers/jp/jp.go	86.36%	2 Missing and 1 partial ⚠️
pkg/core/projection/projection.go	0.00%	3 Missing ⚠️
pkg/commands/jp/query/command.go	0.00%	2 Missing ⚠️
pkg/json-engine/engine.go	66.66%	1 Missing ⚠️
pkg/matching/match.go	50.00%	1 Missing ⚠️
pkg/server/playground/handler.go	0.00%	1 Missing ⚠️
pkg/server/scan/handler.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #506      +/-   ##
==========================================
+ Coverage   23.84%   23.89%   +0.05%     
==========================================
  Files          92       92              
  Lines        4236     4235       -1     
==========================================
+ Hits         1010     1012       +2     
+ Misses       3127     3125       -2     
+ Partials       99       98       -1     

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