Query builder v2

[quinchs]

Summary

This PR adds the long awaited query builder to the main development branch. Before this awesome feature can be added, there is still some stuff to add:

TODO:

• [ ] Base query functions.
  • [ ] select
    • [x] Basic select funtionality.
    • [ ] Support for JsonVariable.
    • [ ] Advanced default shape generation.
    • [ ] Shape API clarification.:
      • [ ] Reference selects, ex: select x
      • [ ] Type selects, ex: select Person
      • [ ] Mixed shapes for both
  • [ ] update
    • [ ] Support for JsonVariable.
  • [ ] delete
    • [ ] Support for JsonVariable.
  • [x] insert
    • [x] Support for JsonVariable.
    • [x] Smart property access (only set properties which are required or dont have default value)
  • [x] with
    • [x] Context reflects with blocks
    • [ ] Maintain sub query shape on references
    • [x] Scalar value serialization
    • [x] Array serialization
    • [x] Set serialization
    • [x] Reference set serialization
  • [x] for
    • [x] Retest and fix based on https://github.com/edgedb/edgedb/issues/4090, https://github.com/edgedb/edgedb/issues/4080, and https://github.com/edgedb/edgedb/issues/4094
  • [ ] group (dependent on CIL parser)
• [ ] EdgeQL standard library.
  • [x] Add generator for stdlib.
  • [ ] Update v1 system for calling std functions to newer & faster version.
  • [ ] Update naming conventions to match the edgedb docs.
• [ ] Link support.
  • [x] Single links
  • [x] Multi links
  • [ ] Link backreferencing, ex person1 points to person2 which points to person 1 recursively.
• [x] Backlinks
• [x] Property selection/mutation logic
• [x] Free objects
• [x] Anonymous types as shapes
• [x] Base expression to edgeql translators ex: string (string a) => a.ToLower(); -> str_lower(a)
  • [ ] Parameter context (don't allow usage of a parameter in some conditions)
  • [x] Binary: 1+1
  • [x] Conditional: 1 if true else 2
  • [x] Constant: "const"
  • [x] Initialization: new Thing{}
  • [x] Lambda: () => {}
  • [x] Member: x.Property
  • [x] MethodCall: EdgeQL.ILike(a,b);
  • [x] Array: new int[] { 1, 2, 3 }
  • [x] Parameter (x) => x.Thing;
  • [x] Unary: (string)thing;
• [x] Contextual function calls
• [x] Object-level constraints
• [x] Property level constraints
• [x] https://github.com/quinchs/EdgeDB.Net/issues/22
• [ ] CIL parser (CIL -> Expressions).
• [ ] Unit tests
• [ ] Docs

Closes #17