Modify `version` command to check versions for subcharts and optionally check for updates

Convert this script to golang and have it be the "check" functionality command created in #194 (closed).

Acceptance Criteria

• Update bbctl version to take an optional CHART_NAME which returns the deployed version of a given chart.
• By default, bbctl version should print the bbctl client version as well as the deployed version of the bigbang umbrella chart.
• bbctl version should also optionally accept an -A / --all-charts command that lists out all deployed charts and subcharts alongside their version
• bbctl version should support a --check or --check-for-updates flag that checks the upstream repository for changes (as the script does) and prints the information to the user.
• bbctl version --check-for-updates should support the CHART_NAME positional arg to check for updates on that specific chart

Considerations:

Implement the command in such a way that loads strings and constants from configurations so we can choose to add --upstream-url or --target-version flags in the future to this and the update command.