[Go] make core the home of codegen (#245)

Move the go:generate lines into core/core.go

Make core the default package for codegen.

Delete genkit/gen.go; no generated types live there.

go/core/core.go

@@ -12,6 +12,13 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Run the npm script that generates JSON Schemas from the zod types
+// in the *.ts files. It writes the result to genkit-tools/genkit-schema.json
+//go:generate npm --prefix ../../genkit-tools run export:schemas
+
+// Run the Go code generator on the file just created.
+//go:generate go run ../internal/cmd/jsonschemagen -outdir .. -config schemas.config ../../genkit-tools/genkit-schema.json core
+
 // Package core implements Genkit actions, flows and other essential machinery.
 // This package is primarily intended for genkit internals and for plugins.
 // Applications using genkit should use the genkit package.

go/genkit/schemas.config → go/core/schemas.config

@@ -67,12 +67,10 @@ FlowInvokeEnvelopeMessageRunScheduled omit
 Operation						omit
 
 FlowStateExecution				name flowExecution
-FlowStateExecution				pkg core
 FlowStateExecution.startTime	type gtime.Milliseconds
 FlowStateExecution.endTime		type gtime.Milliseconds
 
 FlowError						name flowError
-FlowError						pkg core
 
 GenerateRequest.messages      doc
 Messages is a list of messages to pass to the model. The first n-1 Messages

go/genkit/genkit.go

@@ -12,13 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// Run the npm script that generates JSON Schemas from the zod types
-// in the *.ts files. It writes the result to genkit-tools/genkit-schema.json
-//go:generate npm --prefix ../../genkit-tools run export:schemas
-
-// Run the Go code generator on the file just created.
-//go:generate go run ../internal/cmd/jsonschemagen -outdir .. -config schemas.config ../../genkit-tools/genkit-schema.json genkit
-
 // Package genkit provides Genkit functionality for application developers.
 package genkit