fix: Partially fix #3189

[heath-freenome]

Reasons for making this change

Partially fix #3189 by allowing for changing the type of the schema via a new generic S

• 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

Checklist

• I'm updating documentation
  • I've checked the rendering of the Markdown text I've added
• I'm adding or updating code
  • I've added and/or updated tests. I've run npm run test:update to update snapshots, if needed.
  • I've updated docs if needed
  • I've updated the changelog with a description of the PR
• I'm adding a new feature
  • I've updated the playground with an example use of the feature