Create Unified Tutorial Recommendations/ path

[BobSaidHi]

I'm thinking:

• Java: Not sure. Code Academy was good but too basic, Helsinki was kind of a pain, need to check Wiki... ones
• Git - MDN + custom notes
• GitHub Desktop - official(?) + custom notes
• WPILib - official (?) + custom case study
• Firmware - custom + official docs

Checklist:

• Git background
• GitHub desktop
• Custom git
• Java
• WPILib-j basic
• WPILib-j command-based
• WPILib-j intro to advanced
• Firmware

Other:

• Also maybe a dedicate tutorials summary page
• Find more tutorials online