v0.2.0: The path towards a stable Recipe format

Lots of good work in the release towards making the recipe format more usable.

What's Changed

• Update installation instructions to use conda and add missing operators to documentation by James Frost (@jfrost-mo) in #94
• Update index.rst by Sylvia Bohnenstengel (@Sylviabohnenstengel) in #95
• Improve installation instructions by James Frost (@jfrost-mo) in #97
• Use speedy libmamba when resolving conda environments by James Frost (@jfrost-mo) in #105
• Add documentation on rational by James Frost (@jfrost-mo) in #102
• Relax version requirement for sphinx by James Frost (@jfrost-mo) in #108
• Run PR checks on push to main by James Frost (@jfrost-mo) in #109
• Move to YAML recipe format by James Frost (@jfrost-mo) in #119
• Lock pre-commit config to specific SHA by James Frost (@jfrost-mo) in #118
• Use recipes from environment variable by James Frost (@jfrost-mo) in #122

Full Changelog: v0.1.1...v0.2.0