Why this change?
This is a continuation of a30d73f255
In our schema, we support the `min` and `max` validation
rules like so:
```
some_objects_setting
type: objects
schema:
name: some_object
properties:
id:
type: float
validations:
min: 5
max: 10
```
While the validations used to validate the objects on the server side,
we should also add client side validation for better UX.
What does this change do?
Since the integer and float input fields share very very similar logic
in the component. This commit pulls the common logic into
`admin/components/schema-theme-setting/number-field.gjs` which
`admin/components/schema-theme-setting/types/integer.gjs` and `admin/components/schema-theme-setting/types/float.gjs`
will inherit from.
