Init (#17)

* add basic gitignore

* init go mod

* add semrel and badges

* add error pkg

* added config pkg

* added main cmd structure

* return error on file not found and added log ids and messages

* add todo for error_creator.go

internal/errors/unauthenticated.go

@@ -0,0 +1,34 @@
+package errors
+
+import (
+	"fmt"
+)
+
+var (
+	_ Unauthenticated = (*UnauthenticatedError)(nil)
+	_ Error           = (*UnauthenticatedError)(nil)
+)
+
+type Unauthenticated interface {
+	error
+	IsUnauthenticated()
+}
+
+type UnauthenticatedError struct {
+	*CaosError
+}
+
+func ThrowUnauthenticated(parent error, id, message string) error {
+	return &UnauthenticatedError{createCaosError(parent, id, message)}
+}
+
+func ThrowUnauthenticatedf(parent error, id, format string, a ...interface{}) error {
+	return ThrowUnauthenticated(parent, id, fmt.Sprintf(format, a...))
+}
+
+func (err *UnauthenticatedError) IsUnauthenticated() {}
+
+func IsUnauthenticated(err error) bool {
+	_, ok := err.(Unauthenticated)
+	return ok
+}