[FEATURE] Add flags for generating .ir and .hir files

[LuisOtavio13]

Problem

Currently we can't see the HIR or the IR, and switching backends is difficult without recompiling everything from scratch

Proposed Solution

Add flags to generate IR and HIR files, for example: --hir and --ir.

Alternatives Considered

Describe any alternative solutions or features you've considered.

Use Case Example

How would this feature be used? Provide code examples if applicable.

cargo run --target exemple.slynx --ir --hir

Additional Context

Add any other context, mockups, or screenshots about the feature request here.

Benefits

change the backend without the need to recompile the HIR or the IR

[cykna]

This is already intended to be made on #37.