Remove the printer layer and make the Kubb AST the single generation IR

[ast] 2c: Split factory primitives from high-level domain builders

[ast] 1f: Extract import/export/source merge into utils/fileMerge.ts

[ast] 1b: Extract rendered-text builders into utils/codegen.ts

core: simplify the Kubb class and settle the builder-pattern question

Setup wizard failing without plugin oas

Vue-Query missing parameters disable query but are not optional in the type

Fetcher with `paramsCasing: 'camelcase'` generates unused snake case variables

Schema components as references to other schema fails

Tweak zod import