Merge pull request #52753 from munnerz/sample-controller

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

sample-controller: add example CRD controller

**What this PR does / why we need it**:

Adds a sample-controller example repository

fixes #52752

**Special notes for your reviewer**:

This is currently based on the sttts:sttts-codegen-scripts branch and should not be merged until that is (ref https://github.com/kubernetes/kubernetes/pull/52186)

**Release note**:

```
Add sample-controller repository
```

/cc @sttts @nikhita @colemickens

Kubernetes-commit: 9a7800f7d2efb88b397674672ac56f898826cf7c

vendor/golang.org/x/text/secure/precis/profiles.go

@@ -0,0 +1,78 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package precis
+
+import (
+	"unicode"
+
+	"golang.org/x/text/runes"
+	"golang.org/x/text/transform"
+	"golang.org/x/text/unicode/norm"
+)
+
+var (
+	// Implements the Nickname profile specified in RFC 7700.
+	// The nickname profile is not idempotent and may need to be applied multiple
+	// times before being used for comparisons.
+	Nickname *Profile = nickname
+
+	// Implements the UsernameCaseMapped profile specified in RFC 7613.
+	UsernameCaseMapped *Profile = usernameCaseMap
+
+	// Implements the UsernameCasePreserved profile specified in RFC 7613.
+	UsernameCasePreserved *Profile = usernameNoCaseMap
+
+	// Implements the OpaqueString profile defined in RFC 7613 for passwords and other secure labels.
+	OpaqueString *Profile = opaquestring
+)
+
+var (
+	nickname = &Profile{
+		options: getOpts(
+			AdditionalMapping(func() transform.Transformer {
+				return &nickAdditionalMapping{}
+			}),
+			IgnoreCase,
+			Norm(norm.NFKC),
+			DisallowEmpty,
+		),
+		class: freeform,
+	}
+	usernameCaseMap = &Profile{
+		options: getOpts(
+			FoldWidth,
+			LowerCase(),
+			Norm(norm.NFC),
+			BidiRule,
+		),
+		class: identifier,
+	}
+	usernameNoCaseMap = &Profile{
+		options: getOpts(
+			FoldWidth,
+			Norm(norm.NFC),
+			BidiRule,
+		),
+		class: identifier,
+	}
+	opaquestring = &Profile{
+		options: getOpts(
+			AdditionalMapping(func() transform.Transformer {
+				return mapSpaces
+			}),
+			Norm(norm.NFC),
+			DisallowEmpty,
+		),
+		class: freeform,
+	}
+)
+
+// mapSpaces is a shared value of a runes.Map transformer.
+var mapSpaces transform.Transformer = runes.Map(func(r rune) rune {
+	if unicode.Is(unicode.Zs, r) {
+		return ' '
+	}
+	return r
+})