feat: support external JSON schema file references in type generation

[tak-amboss]

Description

Enables the use of external JSON schema file references in type generation by adding the cwd parameter to json-schema-to-typescript's compile() function.

Changes

• Added cwd: process.cwd() parameter to generateTypes() compile call
• Enables $ref pointers to external .json schema files in typescriptSchema field config
• Added test case with external schema file reference
• Documented external schema reference usage in generating-types.mdx

Test Coverage

✅ New test: resolves external schema file references

• Created test/types/schemas/custom-type.json as external schema
• Added field with typescriptSchema referencing the external file
• Verified generated types include the external type correctly

Example Usage

// payload.config.ts
{
  typescript: {
    schema: [
      ({ jsonSchema }) => {
        jsonSchema.definitions.MyType = {
          $ref: './schemas/my-type.json'
        }
        return jsonSchema
      },
    ]
  }
}

External references are resolved relative to process.cwd().

Related Issue

This was identified during investigation of JSON Schema parser capabilities. The cwd parameter is a standard json-schema-to-typescript option that was not being passed.

[GermanJablo]

That makes sense to me! Thank you!

[github-actions]

🚀 This is included in version v3.66.0