exporter: go, added docs

Signed-off-by: Sebastian Schleemilch <[email protected]>

docs/go.md

@@ -0,0 +1,63 @@
+# Go lang struct exporter
+
+This exporter produces type struct definitions for the [go](https://go.dev/) programming language.
+
+## Exporter specific arguments
+
+### `--package`
+
+The name of the package the generated sources (output and types output) will have.
+
+# Example
+
+```yaml
+# model.vspec
+Vehicle:
+  type: branch
+  description: Vehicle
+Vehicle.Speed:
+  type: sensor
+  description: Speed
+  datatype: uint16
+Vehicle.Location:
+  type: sensor
+  description: Location
+  datatype: Types.GPSLocation
+```
+
+```yaml
+# types.vspec
+Types:
+  type: branch
+  description: Custom Types
+Types.GPSLocation:
+  type: struct
+  description: GPS Location
+Types.GPSLocation.Longitude:
+  type: property
+  description: Longitude
+  datatype: float
+Types.GPSLocation.Latitude:
+  type: property
+  description: Latitude
+  datatype: float
+```
+
+```bash
+vspec export go --vspec model.vspec --types types.vspec --package vss --output vss.go
+```
+
+```go
+package vss
+
+type Vehicle struct {
+	Speed uint16
+	Location TypesGPSLocation
+}
+type TypesGPSLocation struct {
+	Longitude float32
+	Latitude float32
+}
+```
+
+`--types-output` can be used to write `Types*` definitions into a separate file with the same package name.

docs/vspec.md

@@ -52,6 +52,7 @@ vspec export json --vspec spec/VehicleSignalSpecification.vspec --output vss.jso
 - [id](./id.md)
 - [protobuf](./protobuf.md)
 - [samm](./samm.md)
+- [go](./go.md)
 
 ## Argument Explanations