✨ Update AutoUi on schema change

[ollyhensby]

Feature Request
To make it possible for an AutoUi object to update based on a new schema passed.

Expected Behaviour
Create AutoUi object.

from ipyautoui import AutoUi
from pydantic import BaseModel

class Stringy(BaseModel):
    stringy: str

ui = AutoUi(schema=Stringy)
display(ui)

Displays this UI object.

Then setting schema

class Inty(BaseModel):
    inty: int

ui.schema = Inty.schema() OR ui.schema = Inty

Would display this on the same UI object.

Use Case
My use case for this is when using EditGrid: the value and schema can be set in the object, which updates the DataGrid, but the AutoUi object doesn't update leading to a mismatch between the columns (or rows) shown in the DataGrid and the fields in the AutoUi object. The only way this can be done is by re-instantiating the whole EditGrid object. It would be great to have an AutoUi schema setter that updates AutoUi object.

[jgunstone]

this will be possible following the next update

[jgunstone]

reviewing this again... I'm not 100% sure it is possible...
this @classmethods init the form from schema / model:

ipyautoui/src/ipyautoui/watch_validate.py

Lines 133 to 168 in 3421b2e

	@classmethod
	def from_jsonschema(cls, schema: dict, value: ty.Any = None, **kwargs):
	if not isinstance(schema, dict):
	raise ValueError(f"schema must be a dict of type jsonschema, not {type(schema)}")
	else:
	model = None
	if "$defs" in schema.keys():
	try:
	schema = replace_refs(schema)
	schema = {k: v for k, v in schema.items() if k != "$defs"}
	except ValueError as e:
	logger.warning(f"replace_refs error: \n{e}")
	pass
	if value is not None:
	schema["value"] = value
	schema = {**schema, **kwargs}
	ui = cls(**schema)
	ui.schema = schema
	return ui
	@classmethod
	def from_pydantic_model(cls, model: ty.Type[BaseModel], value: ty.Any = None, **kwargs):
	if not (issubclass(model, BaseModel) or issubclass(model, RootModel)):
	raise ValueError(f"schema must be a pydantic model, not {type(model)}")
	else:
	schema = replace_refs(model.model_json_schema())
	schema = {k: v for k, v in schema.items() if k != "$defs"}
	if value is not None:
	schema["value"] = value
	schema = {**schema, **kwargs}
	ui = cls(**schema)
	ui.model = model
	ui.schema = schema
	ui._init_validation_error()
	ui._set_validate_value(ui.value)
	return ui

probs need to extract them out and make a tr.observe event to super().__init__() on change... not 100% it would work well though...