Support user configurable Repos for possible issues

[llxia]

We should enhance #1109 to support user-configurable Repos for possible issues.
Create a config file for a list of repo urls and repos. Loop through them to return possible issues.
trssConf.json can. be used for storing tokens if needed.

[SehrishHussain]

@llxia If this issue is open to contributions, can I work on it?

[jiekang]

I believe this was complete via #1126, so closing.