feat(plugin-encryption): Create new plugin-encryption

[bhabalan]

COMPLETES #https://jira-eng-gpk2.cisco.com/jira/browse/SPARK-580068

This pull request addresses

Creation of plugin-encryption

by making the following changes

Added new plugin-encryption

Change Type

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Documentation update
• [ ] Tooling change
• [ ] Internal code refactor

The following scenarios were tested

Tested that we can download and decrypt files using the plugin

I certified that

• [x] I have read and followed contributing guidelines

• [x] I discussed changes with code owners prior to submitting this pull request

• [x] I have not skipped any automated checks

• [x] All existing and new tests passed

• [x] I have updated the documentation accordingly

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Make sure to have followed the contributing guidelines before submitting.