Add .npmignore so we publish only the built library

Author: SergeAstapov

.npmignore

@@ -0,0 +1,23 @@
+/.github/
+/.vscode/
+/examples/
+/src/
+/tests/
+/.eslintignore
+/.eslintrc.cjs
+/.gitignore
+/.prettierignore
+/.prettierrc.cjs
+/.release-it.json
+/.release-plan.json
+/CODE_OF_CONDUCT.md
+/CONTRIBUTING.md
+/RELEASE.md
+/ast-notes.md
+/design.md
+/index.html
+/pnpm-lock.yaml
+/pnpm-workspace.yaml
+/tsconfig.json
+/tsconfig.lint.json
+/vite.config.ts