Support .mts and .cts config extensions

[beerose]

Description

This is a continuation of #9086. Added support for .mts and .cts file extensions. This PR depends on a change in graphql-config (which also adds support for .mts, .cts and ESM in general): kamilkisiela/graphql-config#1281

Related #8862

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Added new examples.

Test Environment:

• OS: macOS
• @graphql-codegen/...:
• NodeJS: 19.x

Checklist:

• I have followed the CONTRIBUTING doc and the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

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Latest commit: 56635af

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