Eo/add GitHub rego function

[eochoa260]

$ cat policy.rego                                          
package opslevel

import future.keywords

description := opslevel.repo.github("OpsLevel", "opslevel-go")["description"]
language := opslevel.repo.github("OpsLevel", "opslevel-go")["language"]                                                                                                                                                                                                                                                  

$ go run main.go run policy -f policy.rego --github-token <github-token>
{"description":"A Go client for interacting with OpsLevel","language":"Go"}

[codecov]

Codecov Report

Merging #45 (ed52c34) into main (f270d32) will not change coverage.
The diff coverage is n/a.

❗ Current head ed52c34 differs from pull request most recent head dcea704. Consider uploading reports for the commit dcea704 to get more accurate results

@@          Coverage Diff          @@
##            main     #45   +/-   ##
=====================================
  Coverage   3.27%   3.27%           
=====================================
  Files          5       5           
  Lines        244     244           
=====================================
  Hits           8       8           
  Misses       236     236           

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[eochoa260]

Still working on getting this to work with env var too but doesn't seem to work when I add the viper bindenv like in root.go.

[rocktavious]

A bunch of questions and a few changes

[rocktavious]

LGTM