Import/export json-schemas and OpenAPI schemas

[cosmicBboy]

Is your feature request related to a problem? Please describe.
The problem statement here is the same as the one articulated in #420

Describe the solution you'd like
Support the importing of json-schema and Open API data models with the following interface:

import pandera as pa

pandera_schema = pa.io.from_json_schema("path/to/schema.json")
json_schema = pandera_schema.json_schema()

pandera_schema = pa.io.from_open_api_schema("path/to/schema.json")
open_api_schema = pandera_schema.open_api_schema()

NOTE: This should probably be split into to issues, one for JSON schema, another for OpenAPI

For details on modules that would be involved in implementing this feature, see #420 (comment)

Describe alternatives you've considered

• users implement their own schema importing functions.

Additional context
See the discussion in #420

[maxibor]

Just a comment to upvote this feature request, it would make make Pandera super nice to use for https://github.com/spaAM-community/ancientmetagenomedir/tree/dev and https://github.com/SPAAM-community/AMDirT

[muppetjones]

Another comment to upvote. I have JSON schema written for so many things -- would be great to reuse it

[hongha912]

Upvote from me too! We use JSON schema a lot for import/exporting our data.

[GuyAttia]

Upvote from me as well. We want to use it across different tools which use JSON Schema

[josedaniel-escribano-clarity]

Really interested in this feature :)

[toclarity]

Upvote. Having this feature would be awesome. We have so many JSON Schemas... This would considerably simplify migrating all our validations to Pandera and, thus, make them much more efficient. 🤞

[victorrmclarity]

Upvote. We need this feature to adapt all of our domain json schema to Panderas

[DaniSancas]

It would be really helpful to have this feature implemented 🙌

[silviacobo9]

Another upvote here. This will help a lot on our day to day work

[martingoldthen]

+1

[adela-molina]

yes please

[jlrcolmenares]

this could be really useful