feat: unifood base with GET dishes (#1)

Features:
- CLI structure with verbs and resources
- Application config and parameters
- Output formatters
- Initial resource: dishes

Reviewed-on: #1
Co-authored-by: bdoerfchen <git@bissendorf.co>
Co-committed-by: bdoerfchen <git@bissendorf.co>

core/output/json.go

@@ -0,0 +1,17 @@
+package output
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+
+	"git.bissendorf.co/bissendorf/unifood/m/v2/core/interfaces"
+)
+
+type JsonFormatter struct{}
+
+func (f *JsonFormatter) Format(list *interfaces.ResourceList) (io.Reader, error) {
+	var buffer = make([]byte, 0, 1024)
+	outputBuffer := bytes.NewBuffer(buffer)
+	return outputBuffer, json.NewEncoder(outputBuffer).Encode(list)
+}