Add scope support to access tokens

[thinkst-marco]

- What I did

Add support for token scopes. Access Tokens created in the web interface can take a single scope value but this isn't available in hub-tool. This change lets the user create tokens with a specific scope.

- How I did it

Two user-facing changes:

1. Added a --scope parameter to token create.
2. Added a SCOPE column to token ls

- How to verify it

The following calls add tokens with the specified scopes:

$ hub-tool token create --scope public_read --format json | jq -c '.Scopes'
[ "repo:public_read" ]
$ hub-tool token create --scope read --format json | jq -c '.Scopes'
[ "repo:read" ]
$ hub-tool token create --description test-cli-scope-5 --scope write --format json | jq -c '.Scopes'
[ "repo:write" ]
$ hub-tool token create --description test-cli-scope-5 --scope admin --format json | jq -c '.Scopes'
[ "repo:admin" ]

Showing the added column in token ls:

$ hub-tool token ls
DESCRIPTION         UUID                                    LAST USED         CREATED          ACTIVE    SCOPE
[...]

- Description for the changelog

Add scope support to access tokens

- A picture of a cute animal (not mandatory)

[zdhamasha]

can anyone merge this

[jaythamke]

Is there new update here? Or code review required? regards, Jayesh

[jaythamke]

Hi @converge, I observed that you mentioned this PR in your fix #203 , but we do not find the mention in your PR. Could you please confirm if the changes in this PR are included in your PR?