- Updated `@rjsf/utils` to make the `schema` and `rootSchema` props use a new generic type `S`
  - Added the new `StrictRJSFSchema` type as the alias to `JSON7Schema` changing `RJSFSchema` to be `StrictRJSFSchema & GenericObjectType`
  - Deleted the `RJSFSchemaDefinition` type in favor of accessing it indirectly via the `S["<prop-with-definition>"]` syntax
  - Added the new generic `S extends StrictRJSFSchema = RJSFSchema` to all types that directly or indirectly used `RJSFSchema` after the `T = any` type
  - Updated `SchemaUtilsType` to add the `F = any` generic to the whole interface, removing it from the definition of the two functions that need it
  - Updated all functions that used `RJSFSchema` to take the new generic, replacing `RJSFSchema` with `S`
  - Added missing generics where needed
- Updated `@rjsf/core` to insert the `S extends StrictRJSFSchema = RJSFSchema` to every component that needed it, after the `T = any` generic
  - Updated the `index.ts` for the `ButtonTemplates`, `field`, `templates` and `widgets` to make them functions that take the `T`, `S` and `F` generics
  - Updated `getDefaultRegistry()` and `templates()` to call the appropriate functions
  - Replaced all uses of `RJSFSchema` and `RJSFSchemaDefinition` with `S` and `S["<prop-with-definition>"]`
  - Added missing generics where needed
  - Fixed a few type casts due the to the change in the `RJSFSchema` type
- Updated `@rjsf/validator-ajv6` to fix a few type casts due to the change in the `RJSFSchema` type
- Updated `@rjsf/validator-ajv8` to add the `S extends StrictRJSFSchema = RJSFSchema` generic to the `customizeValidator()` function and the `AJV8Validator` class
  - Replaced all uses of `RJSFSchema` and `RJSFSchemaDefinition` with `S` and `S["<prop-with-definition>"]`
  - Changed `RJSFSchema` to `S` where applicable
  - Fixed a few type casts due the to the change in the `RJSFSchema` type

Fix comment

Co-authored-by: Nick Grosenbacher <nickgrosenbacher@gmail.com>