v0.3.0

What's Changed

• refactor(core): simplify codebase and add UX improvements by @lostmygithubaccount in #34
• feat(core): add arrow snap-to-shape connection points by @lostmygithubaccount in #35
• docs: add CONTRIBUTING.md and README badges by @lostmygithubaccount in #36
• test(core): add integration tests for public API surface by @lostmygithubaccount in #37
• docs(examples): add runnable hello-world in Rust and Python by @lostmygithubaccount in #38
• docs: add CHANGELOG.md by @lostmygithubaccount in #39
• chore(lints): adopt surgical clippy opt-ins workspace-wide by @lostmygithubaccount in #40
• docs(examples): add gallery of 5 canonical drawings by @lostmygithubaccount in #41
• refactor(core): demote unused pub items to pub(crate) by @lostmygithubaccount in #42
• test(py): add coverage for PyO3 bindings + gallery round-trip by @lostmygithubaccount in #43
• chore: release 0.3.0 by @lostmygithubaccount in #44

Full Changelog: v0.2.1...v0.3.0