Support $ref that splices arrays inline

[rkhoriander]

Currently, $ref only merges content when it resolves to an object. Per the docs: "If a $ref resolves to a non-object value such as an array, Mintlify ignores any sibling keys." This makes $ref unusable for splitting any array-valued key in docs.json, including redirects and pages.

Our use case: we have 695 redirects that we've organized into 34 per-section files. We'd like to assemble them natively at build time rather than maintaining a custom Python script and GitHub Action. We'd also like to use $ref within pages arrays to split tab navigation into per-section files.

Please support $ref as an element within an array, where the referenced content is spliced inline:

json{
  "redirects": [
    { "$ref": "redirects/configure.json" },
    { "$ref": "redirects/send-data.json" },
    { "$ref": "redirects/api-docs.json" }
  ]
}

Where each referenced file contains an array of objects that gets merged into the parent array at that position. This would unlock split configuration for any array-valued key (redirects, navigation pages, and anything else) making $ref genuinely useful for large documentation sites that need to manage config across multiple files.