[Web] ORT web cannot enumerate inputs

### Describe the issue

ORTWeb’s API should expose a model input’s data type and named dimensions, but the JS/TS [InferenceSession API](https://onnxruntime.ai/docs/api/js/variables/InferenceSession-2.html) is missing this ability.

In ORT Native (C++), you can call:

`Ort::Session::GetInputCount()`
`Ort::Session::GetInputNameAllocated` -> name
`Ort::Session::GetInputTypeInfo` -> `Ort::TypeInfo`
`Ort::TypeInfo::GetTensorTypeAndShapeInfo`

### To reproduce

See publicly available APIs.

### Urgency

_No response_

### ONNX Runtime Installation

Released Package

### ONNX Runtime Version or Commit ID

n/a

### Execution Provider

Other / Unknown