PoC: Support for schema.json in tbls

[MH4GF]

（Liam ERD、tblsのschema.jsonに対応してくれたら最高なんだけどな...）

https://x.com/k1LoW/status/1882337184742867003

Support for schema.json in tbls would greatly increase the number of formats that can be supported by the CLI. I would like to verify this as a PoC once.

[MH4GF]

Prepare a miscellaneous TypeScript type from the following struct type definition and try to implement it. 🏃🏻

https://github.com/k1LoW/tbls/blob/25f6252b243598154edf5ba40808e1b643567d9f/schema/schema.go#L33-L207

[MH4GF]

• [DO NOT MERGE] PoC: Add tbls schema parsing support #561