fix #6

[al1-ce]

What

What does this pull request accomplish?

• Fix config not being applied

How

What code changes were made to accomplish it?

• Move config setup to lua/octohub/config.lua
• Move plugin/octohub.lua to lua/octohub/setup_cmd.lua
• Make it so that any config requests are taken from octohub.config instead of local copies of config

Why

• I want to fix the issue [BUG]: projects_dir is ignored #6 (issue)

Notes

Might be worth renaming setup_cmd.lua to something more appropriate or moving it's code to either octohub.lua or config.lua

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas (not needed as it's just simple move-around)
• I have made corresponding changes to the documentation (not needed, see above)
• New and existing unit tests pass locally with my changes

[2KAbhishek]

Thanks for taking this on, I will be doing some tweaks on top, appreciate it 🤝