feat: Resolve enums & prepare type system

[jfecher]

Description

Problem*

Working towards #988

Summary*

• Implements def_collector::collect_enums
• Lays down some prep work in the type system for enums. The most significant of which (and the majority of the diff) is changing StructType to DataType to handle structs and enums. Similarly StructId is now TypeId, although I'm leaving metaprogramming changes for a future date (we can abstract these changes there or impose the same merger).
• Implements some missing language server integration

Additional Context

Documentation*

Check one:

• No documentation needed.
• Documentation included in this PR.
• [For Experimental Features] Documentation to be submitted in a separate PR.

PR Checklist*

• I have tested the changes locally.
• I have formatted the changes with Prettier and/or cargo fmt on default settings.

[jfecher]

Currently failing due to the NestedSlice error now failing because it's now catching that we're trying to get the fields of a type which still hasn't had it's fields set yet. This was the case before too but we previously just returned an empty vec of fields.

[github-actions]

Compilation Memory Report

Program	Peak Memory	%
keccak256	43.150	-45%
workspace	60.380	-52%
regression_4709	99.040	-77%
ram_blowup_regression	43.190	-98%
rollup-root	92.330	-85%
rollup-merge	92.330	-82%
rollup-block-root-single-tx	92.330	-100%
rollup-block-root-empty	92.330	-82%
rollup-block-root	92.330	-100%
rollup-block-merge	92.330	-85%
rollup-base-public	92.330	-97%
rollup-base-private	92.330	-92%
private-kernel-tail	75.710	-64%
private-kernel-reset	75.750	-88%
private-kernel-inner	75.720	-75%

[github-actions]

Execution Memory Report

Program	Peak Memory	%
keccak256	43.150	-42%
workspace	61.200	-51%
regression_4709	99.040	-69%
ram_blowup_regression	43.190	-92%
rollup-root	92.330	-82%
rollup-merge	92.330	-81%
rollup-block-root	92.330	-93%
rollup-block-merge	92.330	-82%
rollup-base-public	92.330	-88%
rollup-base-private	92.340	-85%
private-kernel-tail	75.710	-59%
private-kernel-reset	75.750	-70%
private-kernel-inner	75.720	-64%