[near-operation-file-preset] Add `presetConfig.filePerOperation` to generate one file per operation #3745

Job	Run time
Validating dev-tests (esm)	34s
Testing exports integrity	45s
🧹 Prettier Check	36s
Validating dev-tests (cjs)	35s
Linting Check / eslint	24s
Unit Test on Node 22 (ubuntu-latest) and GraphQL v16	58s
Unit Test on Node 24 (ubuntu-latest) and GraphQL v15	48s
Unit Test on Node 20 (ubuntu-latest) and GraphQL v15	1m 8s
Unit Test on Node 20 (ubuntu-latest) and GraphQL v16	1m 6s
Unit Test on Node 24 (ubuntu-latest) and GraphQL v16	46s
Unit Test on Node 22 (ubuntu-latest) and GraphQL v15	59s
Unit Test on Node (windows-latest) and GraphQL v16	57s
	9m 36s

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