Add persisted operations to near-operation-file

Description

Adds persisted operation support to near-operation-file. Since I've no idea what I'm doing, I had Cline (Anthropic AI), copy functionality from client-preset and this is what it came up with.

Type of change

Please delete options that are not relevant.

[x] New feature (non-breaking change which adds functionality)
[ ] This change requires a documentation update

How Has This Been Tested?

Hoping someone else knows how to finish/test this PR.

Checklist:

[x] I have followed the CONTRIBUTING doc and the style guidelines of this project
[x] 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

Further comments

Sorry, I don't know much about codegen plugins. Just hoping this PR will kick start some community progress. I will update this PR if/as I make any more progress.

At a minimum, this code could be used as a reference for issue #496

dotansimha / graphql-code-generator-community