feat: add configurable log levels via env.logLevel (#1507)
* feat: add configurable log levels via env.logLevel
Add LogLevel enum and env.logLevel configuration to control library verbosity.
Create logger utility that respects the configured log level.
Replace console.log/warn calls in pipelines with logger methods.
Rebased onto v4 branch and moved files to packages/transformers folder.
Closes #117
* added logger to backends/onnx.js
* added mapping from logLevel to ONNX Runtime log level
* replaced console.log with logger
* fixed doc builder
* improved jsdoc for logLevel
* removed .venv folder
* removed logger export
* changed how log levels are handled
* 30 to LogLevel.WARNING
* 30 to LogLevel.WARNING
* Remove old comments
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Co-authored-by: Nico Martin <mail@nico.dev>
Co-authored-by: Joshua Lochner <admin@xenova.com>