Add read support for lazy http ndjson

[ceyhunkerti]

• This is a followup for LazyFrame from http endpoint #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!