move away from json-schema-to-typescript

Currently we're depending on `json-schema-to-typescript`, however, it's limited (as noted here https://github.com/pyramation/cosmwasm-typescript-gen/issues/10) so we should look into fully parsing/processing types internally

examples to inspire

https://github.com/iamssen/cosmwasm-typescript-generator/blob/main/cosmwasm-typescript-generator/src/transform/createTypeStore.ts

https://github.com/bcherny/json-schema-to-typescript/blob/master/src/typesOfSchema.ts

https://github.com/bcherny/json-schema-to-typescript/blob/master/src/types/JSONSchema.ts

该 issue 没有指出任何仓库文件、测试或入口点。首先检查当前的 json-schema-to-typescript 集成，然后对比所引用的 createTypeStore.ts、typesOfSchema.ts 和 JSONSchema.ts 示例。完成应意味着项目能够在内部完整解析和处理类型，而不依赖该依赖项，但该 issue 没有定义确切的范围或验证标准。

由索引模型根据 Issue 内容生成。