fix(rg): keep parent dot-ignore active for --no-ignore-vcs

[chaliy]

Motivation

• Fix incorrect semantics where --no-ignore-vcs also disabled parent ignore loading, causing parent .ignore/.rgignore to be skipped for child-root searches which diverges from real ripgrep behavior.

Description

• Stop setting opts.no_ignore_parent when parsing --no-ignore-vcs so parent non‑VCS ignore files remain honored (change in crates/bashkit/src/builtins/rg/mod.rs).
• Add a regression assertion to test_rg_parent_ignore_files that rg --no-ignore-vcs needle /proj/sub still honors the parent .ignore while disabling parent .gitignore.

Testing

• Ran cargo test -p bashkit test_rg_parent_ignore_files -- --nocapture and the test passed.
• Ran package tests via cargo test during validation and observed no test failures in the executed test run.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	bashkit	5cf47b6	Commit Preview URL	May 25 2026, 02:32 AM