feat: support internal field

[sashamelentyev]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces support for internal fields by excluding them from the generated JSON schema. Key changes include:

• Adding internal field detection functions in internal/gen/visibility.go.
• Updating the schema generation logic in internal/gen/schema.go to skip internal fields.
• Updating the proto examples and adding the visibility extension definitions.

Reviewed Changes

Copilot reviewed 5 out of 9 changed files in this pull request and generated no comments.

File	Description
internal/gen/visibility.go	New helper functions to detect internal fields using field visibility.
internal/gen/schema.go	Schema generation now skips fields marked with internal visibility.
example/message.proto	Added an internal field with the internal visibility annotation.
example/google/api/visibility.proto	Added visibility extensions and definitions for proto field visibility.

Files not reviewed (4)

• go.mod: Language not supported
• internal/gen/_golden/internal_field.json: Language not supported
• internal/gen/_golden/internal_field.yaml: Language not supported
• internal/gen/_testdata/internal_field.textproto: Language not supported

[Copilot]

Pull Request Overview

This PR introduces support for internal fields by adding helper functions to determine field visibility and updating the schema generation to skip internal fields.

• Added functions (isInternalField, isPreviewField, isFieldVisibilityIndicator) in internal/gen/visibility.go
• Modified schema generation in internal/gen/schema.go to exclude internal (and non-preview) fields
• Updated proto files to include an example usage of the new visibility extension

Reviewed Changes

Copilot reviewed 5 out of 9 changed files in this pull request and generated 1 comment.

File	Description
internal/gen/visibility.go	New helper functions to evaluate field visibility using the visibility protobuf extension
internal/gen/schema.go	Modified schema generation to skip fields marked as internal (but not preview)
example/message.proto	Added an internal field example with the new visibility extension
example/google/api/visibility.proto	Added proto definitions for specifying field visibility restrictions

Files not reviewed (4)

• go.mod: Language not supported
• internal/gen/_golden/internal_field.json: Language not supported
• internal/gen/_golden/internal_field.yaml: Language not supported
• internal/gen/_testdata/internal_field.textproto: Language not supported

Comments suppressed due to low confidence (1)

internal/gen/schema.go:97

• [nitpick] Consider caching the result of f.Desc.Options() in a variable to avoid calling it twice and to improve code readability.

isInternal := isInternalField(f.Desc.Options()) && !isPreviewField(f.Desc.Options())