fix(rewrite): skip unsupported find predicates

[TechWizard9999]

Description

Fix rewrite behavior for find commands that use unsupported compound predicates/actions. Instead of rewriting those to rtk find (which then errors), we now pass them through as native find.

Related Issue

Closes #664

Changes Made

• added an unsupported-flag guard in rewrite path for find
• skip rewrite when command includes unsupported predicates/actions such as:
  • -not, -exec, -execdir, -ok, -okdir, -delete, -prune, -fls, -fprint, -fprintf, -quit
• added regression tests for -not and -exec
• added changelog entry under Unreleased bug fixes

Files Changed

• src/discover/registry.rs - rewrite guard + tests
• CHANGELOG.md - unreleased bug-fix note for Error: rtk find does not support compound predicates or actions #664

Testing

• cargo fmt --all --check
• rtk cargo clippy --all-targets (2 pre-existing warnings in untouched files)
• rtk cargo test
• rtk cargo test discover::registry::tests::test_rewrite_find_skips_unsupported_not
• rtk cargo test discover::registry::tests::test_rewrite_find_skips_unsupported_exec

Checklist

• Code follows project style guidelines
• Self-review completed
• Documentation updated
• No breaking changes introduced

cc @pszymkowiak for review

[CLAassistant]

All committers have signed the CLA.

[TechWizard9999]

@pszymkowiak could you please review this and let me know if anything needs to change?

[aeppling]

Hey

We are cleaning up the codebase and improving the project structure for better onboarding. As part of this effort, PR #826 reorganizes src/ from a flat layout into subfolders.

No logic changes — only file moves and import path updates.

What you need to do

Rebase your branch on develop when receiving this comment:

git fetch origin && git rebase origin/develop

Git detects renames automatically. If you get import conflicts, update the paths:

use crate::git;        // now: use crate::cmds::git::git;
use crate::tracking;   // now: use crate::core::tracking;
use crate::config;     // now: use crate::core::config;
use crate::init;       // now: use crate::hooks::init;
use crate::gain;       // now: use crate::analytics::gain;

Need help rebasing? Tag @aeppling

[TechWizard9999]

Rebased on latest develop per the refactor notice and force-updated this branch.

@pszymkowiak could you please re-review when convenient?

[TechWizard9999]

Rebased on latest develop and force-pushed with conflict resolution.\n\nRetested the unsupported find predicate behavior included in this PR.\n\n@pszymkowiak @FlorianBruniaux please re-review when convenient.

[TechWizard9999]

Quick maintainer ping after rebase and validation rerun. @pszymkowiak @FlorianBruniaux please re-review when convenient.

[chathurabuddi]

@aeppling @pszymkowiak @FlorianBruniaux kindly merge this?