Add selective and explicit eager-load clearing

[elpete]

Closes #48

Issue review

Recommendation: 9/10 — selectively removing default eager loads is a useful query-level control, provided the API distinguishes omission from an explicit request to clear everything.

Implementation

• without( relationshipName ) removes the named eager load and its nested paths
• without() with no arguments is a no-op and clears nothing
• clearEagerLoads() explicitly removes every configured eager load
• both methods remain chainable on the public Quick builder

Regression coverage

• proves a named automatic eager load can be removed
• proves without() preserves automatic eager loads
• proves clearEagerLoads() removes all eager loads and lazy-loading protection still catches access
• verifies query counts for each behavior

Validation

• focused Lucee 6 EagerLoadingSpec: 36 passed, 0 failed, 0 errors
• formatting check passed
• git diff --check passed

Uses qb@14.0.0-beta.3 and targets next.