Add colors based on Issue / PR state

[wd60622]

Describe what this PR does / why we need it

Using the state, isDraft, stateReason fields from the graphql API to determine the icon and color of the PR or Issue. This should be consistent with the github interface.

This works for :Octo issue / pr list / search and :Octo search

Does this pull request fix one issue?

Related to #485

Describe how you did it

• Add state, isDraft, stateReason to the related graphql queries
• Determine the icon and color based on these fields
• Implement for all list and search commands

Describe how to verify it

Run any of the affected commands and see that the icons will be colored based on the state of the PR or Issue.

Special notes for reviews

This only effects telescope picker

Checklist

• Passing tests and linting standards
• Documentation updates in README.md and doc/octo.txt

[wd60622]

EDIT: Previews of :Octo pr search below

[wd60622]

I have the colors wrong. The merge should be purple and there should be red if closed. Might need to pull in some more in query

[wd60622]

Hi @p5quared, Thanks for the review!

I ended up adding richer set of symbols to match the github interface a bit more. Think it looks way better now

:Octo pr search

:Octo issue search

[GuillaumeLagrange]

Olgtm, you can merge if you agree with the comment.

On a side note, I suggest we default to squash and merge to keep the master git history clean, either this or we make the effort of cleaning up the commits before merging which is a bit overkill for a small project like this.