Blog about ease of onboarding

[cczona]

Getting started with Pants is objectively easier than competing build systems. This distinguishing features has been under-promoted and merits a blog post. Some things worth including:

• Links to user quotes about their onboarding experience, especially in comparison to their attempts to onboard with other build systems
• Pants' design objective of "developer joy" and how it is reflected in the onboarding experience
• What we want to do to further improve the onboarding experience and how you can contribute