Add new OpenAPI 2.0 and 3.0 specifications, including comprehensive type definitions and example files. Update .gitignore and bunfig.toml, and remove obsolete MIGRATION.md. Enhance README with additional usage examples and clarify type definitions.

2.0/data-types/index.ts

@@ -0,0 +1,10 @@
+// Base schema properties
+
+export type { ArraySchema } from "./array";
+export type { BooleanSchema } from "./boolean";
+export type { FileSchema } from "./file";
+export type { IntegerSchema } from "./integer";
+export type { NumberSchema } from "./number";
+export type { ObjectSchema } from "./object";
+// Individual schema types
+export type { StringSchema } from "./string";