config-loader: Config Schema Validation

[azu]

We need to valite a config file written by user.
It means that secretlint need to get runtime validation like JSON Schema Validator.

We'll try to use shellyln/tynder: TypeScript friendly Data validator for JavaScript.

Schema is https://github.com/secretlint/secretlint/blob/master/packages/@secretlint/types/src/SecretLintConfigDescriptor.ts

[azu]

tynder does not support interface O<T>{}.
It is difficult that convert TS to Validator using tynder.

[azu]

ForbesLindesay/typescript-json-validator: Automatically generate a validator using JSON Schema and AJV for any TypeScript type. just work

[azu]

We use typescript-json-validator.