Completed the implementation and made a few changes that we discussed after the initial review. Here is the updated code:
https://bitbucket.org/jaya-sravani/integrated-genome-browser/branch/IGBF-4108
https://bitbucket.org/jaya-sravani/ucsc-genark-data-provider/branch/IGBF-4108
To test:

• Pull both the branches into your local.
• Build and run IGB from the given branch.
• Build the ucsc-genark-data-provider service as well using "mvn clean install"
• Now add the data provder as a plugin in IGB, while choosing the folder choose the generated target folder of the ucsc-genark-data-provider service.
• Load any of the genomes from the table.
• Review the pop-up window and the message it shows.
• Check whether the genome is added as a Quickload with a prefix "GenArk_" in its name.
• Check whether the genome is loaded into IGB. (there won't be any default dataset that will load but all the datasets should be shown under Available data and chromosomes should be loaded.)

Please review the changes and let me know if there's any issue.

Note: This ticket can be tested along with https://jira.bioviz.org/browse/IGBF-4167. PR for this is raised along with that ticket: https://bitbucket.org/lorainelab/integrated-genome-browser/pull-requests/1069

Tested on Sravani's branch 4123 on Mac.

• Popup appears when the "Load" button is clicked
• The genome is added to the data provider with GenArk
• IGB switches to the new genome
• I can load data and sequence for the genome

Ready for PR

Raised a new PR for this as part of https://jira.bioviz.org/browse/IGBF-4123.

Merged PR, built installers and deployed to Early Access section of BioViz.org.

Tested main branch on Mac:

• Popup appears when the "Load" button is clicked
• The genome is added to the data provider with GenArk
• IGB switches to the new genome
• I can load data and sequence for the genome

Closing ticket.