Add read support for lazy http ndjson

[ceyhunkerti]

• This is a followup for https://github.com/elixir-explorer/explorer/pull/993

• Currently reading http ndjson with lazy option is not supported 👇🏼

  iex(2)> frame = Explorer.DataFrame.from_ndjson("http://127.0.0.1:8080/demo.ndjson", lazy: true)
  ** (FunctionClauseError) no function clause matching in Explorer.PolarsBackend.LazyFrame.from_ndjson/3    
  
  The following arguments were given to Explorer.PolarsBackend.LazyFrame.from_ndjson/3:
  
      # 1
      %FSS.HTTP.Entry{
        url: "http://127.0.0.1:8080/demo.ndjson",
        config: %FSS.HTTP.Config{headers: []}
      }
  
      # 2
      1000
  
      # 3
      1000
  
  Attempted function clauses (showing 2 out of 2):
  
      def from_ndjson(%FSS.S3.Entry{}, _, _)
      def from_ndjson(%FSS.Local.Entry{} = entry, infer_schema_length, batch_size)
  
  (explorer 0.10.0-dev) lib/explorer/polars_backend/lazy_frame.ex:230: Explorer.PolarsBackend.LazyFrame.from_ndjson/3
  iex:2: (file)

• This adds support for it.

Manual Test

• to test locally you can download and extract the attached ndjson or simply create one like
• demo.ndjson

  {"a":1}
  {"b":2}

• run http-server . on the path containing demo.ndjson
• Test after the change 👇🏼

  iex(3)> frame = Explorer.DataFrame.from_ndjson("http://127.0.0.1:8080/demo.ndjson", lazy: true)
  {:ok,
  #Explorer.DataFrame<
  LazyPolars[??? x 2]
  a s64 [1, nil]
  b s64 [nil, 2]
  >}

demo.ndjson.tar.gz

[philss]

@ceyhunkerti thank you!