CLI improvements

[kanishkatn]

Task summary

This serves as an epic for CLI improvements.

Currently, we only support the development flow in the cli and it doesn't have a production flow wherein we need to support account generation, custom accounts etc.

• Add a flag to differentiate between development and production use within the CLI.
• Creating separate configuration settings for development and production environments.
• Auto generate account if not specified cli: generate account key if not specified #3255

Other tasks:

• Create a data directory for the databases cli: config improvements for base-path #3211
• Separate config for sync service Use separate peer config for sync service #3240

Other information and links

• Investigate and update CLI  #3163
• refactor(cli): replace urfave/cli with cobra #3173
• cli: generate account key if not specified #3255 (comment)

[timwu20]

@timwu20 investigate if we need any issues created relating to Full Node MVP