chore(api-ref): Uplift API reference docs:

[jstirnaman]

⚠️ For demo only - Don't merge!

• Adapts code from @jstirnaman's demo site to generate Hugo pages from OpenAPI paths in the InfluxDB spec files.

• Uses Rapidoc to render the OpenAPI path in a page--effectively treating each endpoint as a standalone API for faster loading.
  To build the API pages, inside DOCS_ROOT, run

  yarn run build-apidocs

Changes as of 11/5:

• Use js.Build in asset pipeline to transpile and tree-shake ESM modules
• Reorganize JS from HTML sections into modular ESM (benefts: testing, intellisense, package management, explicit dependencies (imports)
• Move some code into Reactish functional components
• Light/dark theme switching for Rapidoc
• Basic light/dark SCSS setup
• Inherits the user's preferred server URL and sets it as the API server URL

Changes as of 9/23:

• No longer uses Hugo /data or separate files--only pages.
• Removes dependency on the Hugo-data-to-pages script.
• For each product endpoint, generate a page with the endpoint spec inside the frontmatter.
• Writes endpoint specs into each page's frontmatter.
• Assign a type property for API reference (OpenAPI) paths. For example, if the page structure is content/influxdb/v2/api/v2/[OpenAPI path], then add type: api_path to the frontmatter and, if necessary, specify a layout: layout: api_path.
• Renders the spec param JSON using Rapidoc.