Support Json-Line

[Daveismus]

Is there interests in supporting json-line files? (https://jsonlines.org/)
This means every line in the log is valid json.

Logging libraries like pythons loguru or structlog support writing that format.

I would be interested in working on this task.

[ptmcg]

Sounds interesting, definitely open to seeing this kind of addition to logmerger. In general, you'll need to:

• implement a FileReader like those in file_reading.py
• provide some way of indicating that a particular file is a jsonlines file (maybe just by file extension)
• figure out how the log timestamp will be determined in the source lines
• figure out how these logs will be presented in the merged display (raw json, or jq-like output) - this may be the most challenging part of this effort (there might be a JSON viewer component/widget available in textual, so you might not have to invent this yourself link)

(logmerger uses another open source project of mine called littletable that can read JSON data of this style, but I never heard of jsonlines.org. You might find littletable of interest to you in this work or in other projects as well. I'll look into loguru and structlog too - thanks!)

[Daveismus]

I created a PR (for the simplest solution) at #47