[graphiql] Add "naming conventions" inspections

[martinbonnin]

Naming is always the hardest thing but there are some established conventions for naming in the GraphQL community, see:

• https://benjie.dev/graphql/naming
• https://www.apollographql.com/docs/graphos/schema-design/guides/naming-conventions

Other languages also have their own code style/conventions:

• Rust
• Kotlin

Of course everyone is free to have their own preferences but I was thinking it'd be a cool default/guidance for the others. Could there be a setting in GraphiQL for this?

See also graphql/graphql.github.io#2013

[dimaMachina]

can be fixed by integrating graphql-eslint as plugin in graphiql

related issue #3057

also can fixes ordering issue #765

+ since graphql-eslint has a lot of rules with fixes and suggestions, errors and warnings can be fixed directly in editor by clicking on apply fix/suggestion button