[stack]: rewrite GraphQL engine - 0

[tusharmath]

TODO

• QueryPlan<Parent> to QueryPlan<Children> chore: implement to_children #2105
• implement Synthesiser chore: implement synthesize #2121
• Integration with IR evaluator
• N + 1 use case
• Drop dependency on example configs in tests.
• Add tests for execution plan generation chore: adding tests #2104
• Field<Parent> to Field<Children> chore: implement to_children #2105
• Port existing integration tests
• Integrate with existing RequestHandler
• Wrap final json with "data"
• fix todo in helper.rs (implement eval_sync for protect and cache)

---

ExecutionDocument to QueryPlan

• Fragments fix: fragments test #2123
• Mutation fix: ExecutionPlan for mutation #2107
• Multiple Operations
• Variables
• Unions
• Arguments - with default params

[codecov]

Codecov Report

Attention: Patch coverage is 82.27593% with 176 lines in your changes missing coverage. Please review.

Project coverage is 84.12%. Comparing base (ab0b519) to head (a8b5e49).
Report is 12 commits behind head on main.

Files	Patch %	Lines
src/core/ir/jit/helper.rs	44.37%	84 Missing ⚠️
src/core/ir/jit/blueprint_index.rs	65.59%	32 Missing ⚠️
src/core/ir/jit/synth.rs	91.07%	24 Missing ⚠️
src/core/ir/jit/context.rs	83.09%	12 Missing ⚠️
src/core/ir/jit/model.rs	91.35%	7 Missing ⚠️
src/core/counter.rs	37.50%	5 Missing ⚠️
src/core/ir/jit/builder.rs	98.17%	4 Missing ⚠️
src/core/ir/jit/execute.rs	93.10%	4 Missing ⚠️
src/core/ir/mod.rs	40.00%	3 Missing ⚠️
src/core/blueprint/blueprint.rs	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2090      +/-   ##
==========================================
- Coverage   84.18%   84.12%   -0.07%     
==========================================
  Files         212      220       +8     
  Lines       20097    21060     +963     
==========================================
+ Hits        16919    17716     +797     
- Misses       3178     3344     +166     

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