Use apiextension v1

- upgrade from apiextension v1beta1 to v1
 - generate yaml manifest for crd intead of applying it at runtime
  - users will have to apply the manifest with kubectl
 - kg and kgctl log an error if the crd is not present
 - now validation should actually work

Signed-off-by: leonnicolas <leonloechner@gmx.de>

vendor/github.com/gobuffalo/flect/flect.go

@@ -0,0 +1,43 @@
+/*
+Package flect is a new inflection engine to replace [https://github.com/markbates/inflect](https://github.com/markbates/inflect) designed to be more modular, more readable, and easier to fix issues on than the original.
+*/
+package flect
+
+import (
+	"strings"
+	"unicode"
+)
+
+var spaces = []rune{'_', ' ', ':', '-', '/'}
+
+func isSpace(c rune) bool {
+	for _, r := range spaces {
+		if r == c {
+			return true
+		}
+	}
+	return unicode.IsSpace(c)
+}
+
+func xappend(a []string, ss ...string) []string {
+	for _, s := range ss {
+		s = strings.TrimSpace(s)
+		for _, x := range spaces {
+			s = strings.Trim(s, string(x))
+		}
+		if _, ok := baseAcronyms[strings.ToUpper(s)]; ok {
+			s = strings.ToUpper(s)
+		}
+		if s != "" {
+			a = append(a, s)
+		}
+	}
+	return a
+}
+
+func abs(x int) int {
+	if x < 0 {
+		return -x
+	}
+	return x
+}