Nesting non-failable in handled failable functions yields warnings

[Ph0enixKM]

Closes #856

[Copilot]

Pull request overview

This pull request fixes issue #856 where nesting non-failable functions inside failable functions with trust modifiers incorrectly generated warnings. The changes refactor context management to use derive macros for cleaner and more maintainable code.

Key changes:

• Refactored trust context management using ContextManager and ContextHelper derive macros for automatic context restoration
• Wrapped function invocation and command typechecking in use_modifiers to properly propagate trust context to nested calls
• Replaced manual std::mem::swap usage with generated helper methods (with_silenced, set_is_trust_ctx)

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/utils/context.rs	Added #[context] attribute to is_trust_ctx field to enable automatic context management
src/modules/command/modifier.rs	Refactored trust context handling using ContextManager derive macro and set_is_trust_ctx setter
src/modules/function/invocation.rs	Wrapped typecheck logic in use_modifiers to propagate trust context; refactored silencing to use with_silenced helper
src/modules/command/cmd.rs	Wrapped typecheck logic in use_modifiers to properly handle trust context in commands
src/modules/builtin/mv.rs	Refactored silencing management to use with_silenced helper method
src/tests/warning/unnecessary_handler.ab	Added test case for warning when non-failable function has failure handler
src/tests/warning/nested_trust.ab	Added test case for nested non-failable function in trust block (should not warn)

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Ph0enixKM]

I'll resolve conflicts later today