Add --format flag to ec-admin running for structured output (CSV/JSON)

[Suvrat1629]

This PR enhances the accumulo ec-admin running command by adding a --format flag to support structured output in CSV and JSON formats. This allows for easier programmatic parsing of running compaction details.

Changes Introduced:
Added --format flag (json, csv, human [default]) to ec-admin running.
Implemented structured output formatting for better readability and parsing.
Updated runningCompactions() method to handle different output formats.
Ensured compatibility with existing behavior by keeping table format as the default.

Fixes #5205

[Suvrat1629]

@kevinrr888 I hope this fixes the fix the issue with the commit history :)

[kevinrr888]

General comments. I suggest running mvn clean verify -Psunny before committing future changes. This will catch a lot of potential issues with new code.

Concerns regarding build failures have been addressed. No further comments at this time

[dlmarion]

This looks pretty good. Have you tested this locally?

[Suvrat1629]

@dlmarion No, I did not understand how to setup the development environment but I wanted to contribute so I decided to open a pr regardless. Sorry about that😅

[dlmarion]

@Suvrat1629 - I would suggest looking at https://github.com/apache/fluo-uno to get a development environment set up so that you can test this locally.

[Suvrat1629]

@dlmarion

git clone https://github.com/apache/fluo-uno.git
cd fluo-uno
./bin/uno fetch accumulo            # Fetches binary tarballs of Accumulo and its dependencies
./bin/uno setup accumulo            # Sets up Accumulo and its dependencies (Hadoop & ZooKeeper)
source <(./bin/uno env)             # Bash-specific command that sets up current shell

I ran this command and got done with the set up.
But i don't how I can test the changes that I have made locally. Where do i run the ./accumulo ec-admin command?

[dlmarion]

@Suvrat1629 - looking at the fluo-uno readme, it looks like you should be able to set the ACCUMULO_REPO environment variable in the uno.conf file and then fluo-uno will build Accumulo from your feature branch. See https://github.com/apache/fluo-uno/blob/main/conf/uno.conf#L46. Once everything is running, Accumulo should be running from the directory specified by the ACCUMULO_HOME variable (see https://github.com/apache/fluo-uno/blob/main/conf/uno.conf#L126). You should be able to run the accumulo ec-admin from the bin directory in $ACCUMULO_HOME.