Implement a more lenient fields parsing for newlines in ChatAdapter

[FireMasterK]

This allows the parser to parse the response, even if the newlines aren't present correctly due to the model not including newlines.

Example error:

Adapter ChatAdapter failed to parse the LM response. 

LM Response: [[ ## next_thought ## ]]
The user wants me to ...snip...transactions.[[ ## next_tool_name ## ]]
redacted[[ ## next_tool_args ## ]]
{
    "query": "redacted"
}
[[ ## completed ## ]] 

Expected to find output fields in the LM response: [next_thought, next_tool_name, next_tool_args] 

Actual output fields parsed from the LM response: [next_thought]