refactor: implement two-phase PrintIR + Renderer for console/util.inspect

Refactors the logging library to use a two-phase approach:
- Phase 1: Build intermediate representation (PrintIR enum) from JS values
- Phase 2: Render IR to formatted string with formatting decisions

This enables:
- Shared codebase between console.log and util.inspect
- Dynamic formatting based on breakLength/compact options
- Better separation of concerns for future enhancements

New files:
- ir.rs: PrintIR enum for intermediate representation
- builder.rs: Converts JS values to PrintIR
- renderer.rs: Renders PrintIR to formatted strings

Also adds util.inspect to API.md documentation.

Author: chessbyte

API.md

@@ -382,6 +382,8 @@ _Also available globally_
 
 [inherits](https://nodejs.org/api/util.html#utilinheritsconstructor-superconstructor)
 
+[inspect](https://nodejs.org/api/util.html#utilinspectobject-options)
+
 [TextDecoder](https://nodejs.org/api/util.html#class-utiltextdecoder)
 
 [TextEncoder](https://nodejs.org/api/util.html#class-utiltextdecoder)