feat: migrate to magicschema

Replace the helm-schema dependency with magicschema for value
inference. The new reader resolves $ref and $defs pointers,
including nested definitions, JSON pointer escapes, and cyclic
references, so generated KCL schemas expand inlined definitions.

Regenerate the example and testdata schemas to match the new
output, and add testdata covering refs, defs, and cycles.

Author: MacroPower

README.md

@@ -305,16 +305,16 @@ The following schema generators are currently available:
 | :-------------- | :------------------------------------------------------------------------------------ | ---------------: |
 | NONE (default)  | Do not use a schema generator (Values will be `[...str]: any`).                       |                  |
 | AUTO            | Try to automatically select the best schema generator for the chart.                  |                  |
-| VALUE-INFERENCE | Infer the schema from one or more values.yaml files (uses [helm-schema][helm-schema]) | `valueInference` |
+| VALUE-INFERENCE | Infer the schema from one or more values.yaml files (uses [magicschema][magicschema]) | `valueInference` |
 | URL             | Use a JSON Schema file located at a specified URL.                                    |     `schemaPath` |
 | CHART-PATH      | Use a JSON Schema file located at a specified path within the chart files.            |     `schemaPath` |
 | LOCAL-PATH      | Use a JSON Schema file located at a specified path within the project.                |     `schemaPath` |
 
 `AUTO` is generally the best option. It currently looks for `values.schema.json` files in the chart directory (i.e. `CHART-PATH` with `schemaPath: "values.schema.json"`), and falls back `VALUE-INFERENCE` (with default arguments) if none are found.
 
-If `VALUE-INFERENCE` is used, the `valueInference` argument will be passed to [helm-schema][helm-schema]. This allows you to use custom arguments with [helm-schema][helm-schema]. See the [helm module docs](./modules/helm/README.md) for more details.
+If `VALUE-INFERENCE` is used, the `valueInference` argument will be passed to [magicschema][magicschema]. This allows you to select which schema annotation formats are parsed (helm-schema, helm-values-schema, bitnami, helm-docs), and whether the generated schema is strict. See the [helm module docs](./modules/helm/README.md) for more details.
 
-[helm-schema]: https://github.com/dadav/helm-schema
+[magicschema]: https://pkg.go.dev/go.jacobcolvin.com/x/magicschema
 
 ### CRD Schema Generators
 
@@ -445,5 +445,5 @@ Also, thanks all of the contributors to other KCL packages and plugins. Notably,
 
 Also, special thanks to:
 
-- [@dadav](https://github.com/dadav) for maintaining [helm-schema](https://github.com/dadav/helm-schema) and [go-jsonpointer](https://github.com/dadav/go-jsonpointer), which are both heavily used in klipper's schema generators.
+- [@dadav](https://github.com/dadav) for maintaining [helm-schema](https://github.com/dadav/helm-schema), the primary schema generator implemented via [magicschema](https://pkg.go.dev/go.jacobcolvin.com/x/magicschema).
 - [@carinacolvin_art](https://www.instagram.com/carinacolvin_art/) for creating the kclipper logo.