Migrate config to KV data format (#8392)

- adding oauth support to MinIO browser (#8400) by @kanagaraj
- supports multi-line get/set/del for all config fields
- add support for comments, allow toggle
- add extensive validation of config before saving
- support MinIO browser to support proper claims, using STS tokens
- env support for all config parameters, legacy envs are also
  supported with all documentation now pointing to latest ENVs
- preserve accessKey/secretKey from FS mode setups
- add history support implements three APIs
  - ClearHistory
  - RestoreHistory
  - ListHistory
- add help command support for each config parameters
- all the bug fixes after migration to KV, and other bug
  fixes encountered during testing.

pkg/color/color.go

@@ -40,9 +40,21 @@ var (
 		}
 		return fmt.Sprintf
 	}()
+	Green = func() func(a ...interface{}) string {
+		if IsTerminal() {
+			return color.New(color.FgGreen).SprintFunc()
+		}
+		return fmt.Sprint
+	}()
+	GreenBold = func() func(a ...interface{}) string {
+		if IsTerminal() {
+			return color.New(color.FgGreen, color.Bold).SprintFunc()
+		}
+		return fmt.Sprint
+	}()
 	CyanBold = func() func(a ...interface{}) string {
 		if IsTerminal() {
-			color.New(color.FgCyan, color.Bold).SprintFunc()
+			return color.New(color.FgCyan, color.Bold).SprintFunc()
 		}
 		return fmt.Sprint
 	}()
@@ -52,6 +64,12 @@ var (
 		}
 		return fmt.Sprintf
 	}()
+	BlueBold = func() func(format string, a ...interface{}) string {
+		if IsTerminal() {
+			return color.New(color.FgBlue, color.Bold).SprintfFunc()
+		}
+		return fmt.Sprintf
+	}()
 	BgYellow = func() func(format string, a ...interface{}) string {
 		if IsTerminal() {
 			return color.New(color.BgYellow).SprintfFunc()