Add comprehensive ConvertTo-Json depth and multilevel composition tests by yotsuda · Pull Request #26744 · PowerShell/PowerShell

…o-Json

Add 34 new Pester tests covering:
- Depth parameter basic behavior (default and explicit depth values)
- Depth truncation with arrays and hashtables
- Depth truncation string representations
- Multilevel compositions (Array/Dictionary/PSCustomObject/Class)
- Complex nested mixed type structures
- Pipeline vs InputObject behavior

This is Phase 4 of the test plan from PR PowerShell#26639.

Co-Authored-By: Claude <noreply@anthropic.com>

- Add truncation test for PowerShell class at Depth limit
- Update all Phase 4 tests to verify both Pipeline and InputObject
- Remove dedicated Pipeline vs InputObject Context

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>