fix(docs): regenerate 6.1.0 snapshots with depth-aware import rewriter

The previous import-path fixer only matched two-level relative paths
(`../../src/` and `../../data/`), missing files at deeper nesting in the
section tree. After the 6.1.0 cut for developer_docs, ~50 component MDX
files at depth 3 still referenced `../../../src/components/StorybookWrapper`
(should have been `../../../../src/...`), and the components Button page
referenced `../../../superset-frontend/...` (should have been
`../../../../superset-frontend/...`). The Docusaurus production build
failed with module-not-found errors as a result.

Replace the pattern-specific regex with a depth-aware walker that
- counts the file's nesting depth within the snapshot,
- bumps any relative import whose `../` count exceeds that depth (i.e.
  the import escapes the section root and so must compensate for the
  extra `version-X.X.X/` directory the snapshot lives under),
- skips fenced code blocks so documented sample imports (e.g. Playwright
  page-object examples in developer_docs/testing/e2e-testing.md) are not
  rewritten.

Re-cut all four sections under the new fixer. yarn build now passes
locally.

docs/developer_docs_versioned_docs/version-6.1.0/api/schemas/chartgetresponseschema.Schema.json

@@ -0,0 +1 @@
+{"schema":{"properties":{"cache_timeout":{"type":"string"},"certification_details":{"type":"string"},"certified_by":{"type":"string"},"changed_on_delta_humanized":{"type":"string"},"dashboards":{"items":{"properties":{"dashboard_title":{"type":"string"},"id":{"type":"integer"},"json_metadata":{"type":"string"}},"type":"object","title":"Dashboard"},"type":"array"},"datasource_id":{"type":"integer"},"datasource_name_text":{"readOnly":true},"datasource_type":{"type":"string"},"datasource_url":{"readOnly":true},"datasource_uuid":{"format":"uuid","type":"string"},"description":{"type":"string"},"id":{"description":"The id of the chart.","type":"integer"},"is_managed_externally":{"type":"boolean"},"owners":{"items":{"properties":{"first_name":{"type":"string"},"id":{"type":"integer"},"last_name":{"type":"string"}},"type":"object","title":"User"},"type":"array"},"params":{"type":"string"},"query_context":{"type":"string"},"slice_name":{"type":"string"},"tags":{"items":{"properties":{"id":{"type":"integer"},"name":{"type":"string"},"type":{"enum":[1,2,3,4]}},"type":"object","title":"Tag"},"type":"array"},"thumbnail_url":{"type":"string"},"url":{"type":"string"},"uuid":{"format":"uuid","type":"string"},"viz_type":{"type":"string"}},"type":"object","title":"ChartGetResponseSchema"},"schemaType":"response"}