Use z-prefixed Go generated files

[qmuntal]

Summary

• rename Go codegen outputs to idiomatic z-prefixed filenames
• update Go generated-file headers to use the Go standard Code generated ... DO NOT EDIT marker
• update generated-file attributes and RPC API shape test path

Tests

• go test . ./rpc

[Copilot]

Pull request overview

This PR updates the Go SDK’s codegen outputs to use z-prefixed filenames (to control file ordering) and switches generated-file headers to Go’s standard // Code generated … DO NOT EDIT. marker, while updating repo metadata/tests that reference the generated files.

Changes:

• Updated Go codegen (scripts/codegen/go.ts) to emit the standard Go generated-file header and write z*-prefixed output filenames.
• Renamed/updated generated Go outputs and their headers (go/zsession_*.go, go/rpc/zrpc*.go).
• Updated Go RPC API shape test and .gitattributes to reference/mark the new generated filenames.

Show a summary per file

File	Description
scripts/codegen/go.ts	Adds a reusable Go “DO NOT EDIT” header helper and updates output paths to z*-prefixed filenames.
go/zsession_events.go	Updates generated header to the standard Go “Code generated … DO NOT EDIT.” marker.
go/zsession_encoding.go	Updates generated header to the standard Go “Code generated … DO NOT EDIT.” marker.
go/rpc/zrpc.go	Updates generated header to the standard Go “Code generated … DO NOT EDIT.” marker.
go/rpc/zrpc_encoding.go	Updates generated header to the standard Go “Code generated … DO NOT EDIT.” marker.
go/rpc/generated_rpc_api_shape_test.go	Updates parsing/error messages to reference zrpc.go.
.gitattributes	Updates generated-file attributes to track the new z* Go generated filenames.

Copilot's findings

Files not reviewed (2)

• go/rpc/zrpc_encoding.go: Language not supported
• go/zsession_encoding.go: Language not supported

• Files reviewed: 5/7 changed files
• Comments generated: 0