Implement commands for API resource management

[pavinduLakshan]

It'd be better to have support for API resource management, including,

• create API
• update API scopes
• delete API
• list API scopes

[pavinduLakshan]

Hi @shashimalcse , I'd like to work on this issue. Could u pls assign this to me?

Edit: seems this issue is already WIP https://github.com/shashimalcse/asgardeo-cli/tree/api-res.

[shashimalcse]

list command : #14

[shashimalcse]

create command : #22

[shashimalcse]

delete command : #23