Refactor

[lijunchen]

No description provided.

[Copilot]

Pull request overview

This PR refactors the compiler pipeline and constructor resolution logic to improve code organization and maintainability.

Changes:

• Restructured the pipeline module by splitting pipeline.rs into a module directory with mod.rs and pipeline.rs
• Moved constructor resolution from AST-level promotion to FIR-level resolution with proper indexing
• Extracted common code for building constructor paths from IDs

Reviewed changes

Copilot reviewed 15 out of 15 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
crates/compiler/src/pipeline/mod.rs	New module file exposing pipeline submodules and utilities
crates/compiler/src/pipeline/pipeline.rs	Main pipeline logic moved from root pipeline.rs, removed AST-level constructor promotion
crates/compiler/src/pipeline/packages.rs	Updated imports and added file sorting for determinism
crates/compiler/src/typer/name_resolution.rs	Added ConstructorIndex and FIR-level constructor resolution logic
crates/compiler/src/typer/check.rs	Extracted constructor path building into reusable method
crates/compiler/src/fir.rs	Added def_paths tracking and new lower_to_fir_files_with_env function
crates/compiler/src/typer/toplevel.rs	Formatting improvements for method chaining
crates/compiler/src/tests/*.rs	Updated imports to use new pipeline module structure
crates/compiler/src/query.rs	Updated imports to use new pipeline module structure
crates/compiler/src/main.rs	Updated imports to use new pipeline module structure
crates/compiler/src/builtins.rs	Formatting improvement
crates/ast/src/lower.rs	Formatting improvement

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