docs(postgrest): hide methods that should not show in the docs

[laurenceisla]

🔍 Description

Hide methods that should not show when auto generating the JS docs.

What changed?

Add @hidden where needed.

Why was this change needed?

Needed when auto generating the JS docs with the relevant methods, interfaces, etc.

📋 Checklist

• I have read the Contributing Guidelines
• My PR title follows the conventional commit format: <type>(<scope>): <description>
• I have run npx nx format to ensure consistent code formatting

[coveralls]

coverage: 95.367% (+14.2%) from 81.176%
when pulling 0f39ae2 on laurenceisla:hide-tsdocs
into 336e498 on supabase:master.

[laurenceisla]

@mandarini I think this UnstableGetResult should also be hidden, but don't know how to do that as it is right now:

supabase-js/packages/core/postgrest-js/src/index.ts

Line 35 in 336e498

export type { GetResult as UnstableGetResult } from './select-query-parser/result'