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.

browser/app/js/utils.js

@@ -107,3 +107,13 @@ export const getRandomSecretKey = () => {
   const base64Str = btoa(binStr)
   return base64Str.replace(/\//g, "+").substr(0, 40)
 }
+
+export const getRandomString = length => {
+  var text = ""
+  var possible =
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+  for (var i = 0; i < length; i++) {
+    text += possible.charAt(Math.floor(Math.random() * possible.length))
+  }
+  return text
+}