Refactor and clean IR module

[mofeing]

I've refactored the IR module so it's easier to maintain and read. I have renamed some functions for more Julia-like names. Also, I have added some missing methods in IR which use functionality from the C-API.

One of the biggest changes is that I've renamed MLIRType to Type. I found out that if we use Core.Type inside the IR module instead of the implicit Type, then there is no symbol clash. In order to avoid other clashes, this type is not exported so we need to access it like MLIR.IR.Type.

Some of these changes are opinionated, some of them not. Please, tell me your opinion.

New features

• Added Identifier, SymbolTable, IntegerSet, AffineExpr, AffineMap types
• MLIRType renamed to Type with no clash with Core.Type

To do

•  Refactor Type
• Refactor Attribute
• Refactor examples
• Add @affinemap Affine map util #35

To do list for other PRs

• Implement simplify(::AffineMap)
• Add MemRefDescriptor
• Refactor pass infrastructure
• Missing Attributes:
  • StridedLayout
  • ResourceElementsAttr
• Transform dialect support

[mofeing]

The Brutus example works now with this PR on both Julia 1.10 and 1.11

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 1.07256% with 3136 lines in your changes are missing coverage. Please review.

Project coverage is 2.72%. Comparing base (8267af4) to head (66e0a34).

Files	Patch %	Lines
src/Dialects/14/LLVMIR.jl	0.00%	433 Missing ⚠️
src/Dialects/14/Vector.jl	0.00%	266 Missing ⚠️
src/Dialects/14/Tosa.jl	0.00%	237 Missing ⚠️
src/Dialects/14/Linalg.jl	0.00%	214 Missing ⚠️
src/Dialects/14/PDLInterp.jl	0.00%	129 Missing ⚠️
src/Dialects/14/Arithmetic.jl	0.00%	128 Missing ⚠️
src/Dialects/15/Arithmetic.jl	12.21%	115 Missing ⚠️
src/Dialects/14/Shape.jl	0.00%	109 Missing ⚠️
src/Dialects/15/GPU.jl	0.00%	93 Missing ⚠️
src/Dialects/14/MemRef.jl	0.00%	86 Missing ⚠️
... and 32 more

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff            @@
##            main     #62      +/-   ##
========================================
+ Coverage   0.84%   2.72%   +1.87%     
========================================
  Files        107     125      +18     
  Lines      27916   28525     +609     
========================================
+ Hits         236     777     +541     
- Misses     27680   27748      +68     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.