158 feature define and implement core physicslanes broadphase solver

[eraflo]

Description

Implement core native physics lanes (Broadphase, Solver)

Refactored the core ECS World struct to adhere to the SAA/CLAD architecture by decomposing it into specialized sub-managers (EntityStore, StorageManager, QueryPlanner). This separation of concerns improves maintainability and prepares the system for the Dynamic Context Core (DCC).

Significant optimizations were introduced, including an $O(1)$ archetype_map in StorageManager to replace linear page searches.

Additionally, implemented Page Vacuuming in the CompactionLane. The WorldMaintenance trait now supports vacuum_hole_at, allowing the generic CompactionLane to actively defragment component pages by moving entities into holes left by removed components, improving memory contiguity and cache locality.

• Closes [Feature] Define and Implement Core PhysicsLanes (Broadphase, Solver) #158
• Implements ECS Decomposition & Optimization (Internal Task)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring / Performance improvements
• Build system / CI improvements
• Other (please describe):

How Has This Been Tested?

Added physic testing.
Ran the full ECS test suite to verify no regressions were introduced by the decomposition. Verified that the new vacuum_hole_at logic correctly compiles and integrates with the CompactionLane.

• New unit tests added/updated for the changes.
• All existing unit tests pass with these changes.
• Manual testing performed as described below:

Test Configuration:

• KhoraEngine Version/Commit: Current HEAD
• OS: Windows

Checklist:

• I have read the CONTRIBUTING.md file.
• My code follows the style guidelines of this project. I have run cargo fmt --all -- --check locally and it passes.
• My code has been linted with cargo clippy --workspace --all-targets --all-features -- -D warnings and there are no new clippy warnings.
• I have performed a self-review of my own code.
• I have commented my code, particularly in hard-to-understand areas or for complex logic.
• I have made corresponding changes to the documentation (if applicable).
• My changes generate no new compiler warnings.
• I have added tests that prove my fix is effective or that my feature works (if applicable).
• New and existing unit tests pass locally with my changes (cargo test --workspace --all-targets --all-features).
• Any dependent changes have been merged and published in downstream modules (if applicable).

[github-actions]

🎉 This PR is included in version 0.4.0 🎉

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