v1.2.0

What's Changed

• docs: reconcile docs with the shipped v1.1.0 release by @kexi in #14
• docs: make README user-facing, move contributor docs to docs/ by @kexi in #15
• docs: move docs/development.md to CONTRIBUTING.md by @kexi in #16
• Package pitty for Nix source builds by @kexi in #17
• Add Windows CI and release support by @kexi in #18
• Release v1.2.0 by @kexi in #19

Full Changelog: v1.1.0...v1.2.0