docs: cut 6.1.0 versions for docs, admin_docs, developer_docs, components

- Snapshot all four versioned docs sections at v6.1.0; master continues to
  serve as "Next" (lastVersion: current, banner: unreleased) so editing
  master keeps updating the canonical URLs
- Enable the previously-disabled components plugin and version it
- Rename stale "developer_portal" references to "developer_docs" across
  package.json scripts, manage-versions.mjs, theme files (DocVersionBadge,
  DocVersionBanner), DOCS_CLAUDE.md, and README.md (URL backward-compat
  redirect /developer_portal/* preserved)
- Add admin_docs version scripts; drop dead "tutorials" plugin id from
  the version badge
- Generalize fixVersionedImports in manage-versions.mjs to walk every
  section's snapshot and rewrite ../../src/ and ../../data/ imports,
  catching admin_docs and components files that previous version cuts
  would have broken
- Remove orphan files: developer_portal_versions.json,
  tutorials_versions.json, and stray empty versions.json files inside
  components/ and developer_docs/ content directories

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

@@ -0,0 +1 @@
+{"schema":{"properties":{"annotationType":{"description":"Type of annotation layer","enum":["FORMULA","INTERVAL","EVENT","TIME_SERIES"],"type":"string"},"color":{"description":"Layer color","nullable":true,"type":"string"},"descriptionColumns":{"description":"Columns to use as the description. If none are provided, all will be shown.","items":{"type":"string"},"type":"array"},"hideLine":{"description":"Should line be hidden. Only applies to line annotations","nullable":true,"type":"boolean"},"intervalEndColumn":{"description":"Column containing end of interval. Only applies to interval layers","nullable":true,"type":"string"},"name":{"description":"Name of layer","type":"string"},"opacity":{"description":"Opacity of layer","enum":["","opacityLow","opacityMedium","opacityHigh"],"nullable":true,"type":"string"},"overrides":{"additionalProperties":{"nullable":true},"description":"which properties should be overridable","nullable":true,"type":"object"},"show":{"description":"Should the layer be shown","type":"boolean"},"showLabel":{"description":"Should the label always be shown","nullable":true,"type":"boolean"},"showMarkers":{"description":"Should markers be shown. Only applies to line annotations.","type":"boolean"},"sourceType":{"description":"Type of source for annotation data","enum":["","line","NATIVE","table"],"type":"string"},"style":{"description":"Line style. Only applies to time-series annotations","enum":["dashed","dotted","solid","longDashed"],"type":"string"},"timeColumn":{"description":"Column with event date or interval start date","nullable":true,"type":"string"},"titleColumn":{"description":"Column with title","nullable":true,"type":"string"},"value":{"description":"For formula annotations, this contains the formula. For other types, this is the primary key of the source object."},"width":{"description":"Width of annotation line","minimum":0,"type":"number"}},"required":["name","show","showMarkers","value"],"type":"object","title":"AnnotationLayer"},"schemaType":"response"}