(feat) AST->HIR Code prep

[AlSchlo]

This PR solves a bunch of problems in the DSL/HIR to allow for the initial transformation from AST -> HIR. Notably:

1. Adds $ and * type extensions in the parser & type system.

Type$ stands for Costed(Type) is covariant and inherits Stored(Type)
Type* stands for Stored(Type) is covariant and inherits Type.

2. Adds an implementation of map in the HIR and the engine where the keys are allowed to be hashed and compared against each other.

3. Adds # to distinguish between field accesses in structs, and member function calls (with .).

4. Fixes the Call evaluate engine function to include indexing arrays, tuples, maps, and operators (including a group/goal expansion when field access is needed).

5. Added the Never type for the Fail expression in the type system.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.61167% with 127 lines in your changes missing coverage. Please review.

Project coverage is 75.3%. Comparing base (f7f9b9f) to head (e620ffb).

Files with missing lines	Patch %	Lines
optd-dsl/src/parser/expr.rs	61.2%	24 Missing ⚠️
optd-core/src/bridge/from_cir.rs	0.0%	22 Missing ⚠️
optd-core/src/bridge/into_cir.rs	0.0%	18 Missing ⚠️
optd-dsl/src/utils/tests.rs	42.8%	16 Missing ⚠️
optd-dsl/src/engine/eval/expr.rs	98.7%	13 Missing ⚠️
optd-dsl/src/analyzer/map.rs	96.6%	11 Missing ⚠️
optd-dsl/src/analyzer/type.rs	95.3%	6 Missing ⚠️
optd-dsl/src/engine/eval/binary.rs	92.1%	6 Missing ⚠️
optd-dsl/src/engine/eval/core.rs	90.0%	3 Missing ⚠️
optd-dsl/src/analyzer/hir.rs	60.0%	2 Missing ⚠️
... and 4 more

Additional details and impacted files

Files with missing lines	Coverage Δ
optd-dsl/src/analyzer/semantic_checker/error.rs	66.6% <100.0%> (+66.6%)	⬆️
optd-dsl/src/analyzer/type_checker/error.rs	0.0% <ø> (ø)
optd-dsl/src/engine/eval/match.rs	99.3% <100.0%> (+<0.1%)	⬆️
optd-dsl/src/engine/eval/operator.rs	100.0% <100.0%> (ø)
optd-dsl/src/engine/eval/unary.rs	80.8% <100.0%> (ø)
optd-dsl/src/engine/mod.rs	56.5% <100.0%> (+0.6%)	⬆️
optd-dsl/src/lexer/error.rs	5.6% <100.0%> (ø)
optd-dsl/src/lexer/lex.rs	97.9% <100.0%> (+<0.1%)	⬆️
optd-dsl/src/parser/function.rs	93.8% <100.0%> (+<0.1%)	⬆️
optd-dsl/src/parser/module.rs	100.0% <ø> (ø)
... and 15 more

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[connortsui20]

I don't have time to look at this in depth, but in general nothing looks out of the ordinary. I do think that error handling methodology could be improved, and from my experience having that done well is super helpful when actually doing the compilation (where a lot of stuff can go wrong)