Adds an ndjson input codec for reading ND-JSON and lenient formats

[dlvenable]

Description

Adds the ndjson codec. This also supports lenient formats where there are not newlines.

Issues Resolved

Resolves #2700

Testing

Tested with:

{"name" :  "one", "value":  1}
{"name" :  "two", "value":  2}{"name" :  "three", "value":  3}
{"name" :  "four", "value":  4}

{}


{"name" :  "five", "value":  5}

{}{"name" :  "six", "value":  6}
{"name" :  "seven", "value":  7}

With stdout sink:

data-prepper  | {"name":"one","value":1}
data-prepper  | {"name":"two","value":2}
data-prepper  | {"name":"three","value":3}
data-prepper  | {"name":"seven","value":7}
data-prepper  | {"name":"four","value":4}
data-prepper  | {"name":"five","value":5}
data-prepper  | {"name":"six","value":6}

Check List

• New functionality includes testing.
• New functionality has a documentation issue. Please link to it in this PR.
  • New functionality has javadoc added
• Commits are signed with a real name per the DCO

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