multi: add accounts u --new_balance deprecation

This commit adds a deprecation notice regarding the
`accounts update --new_balance` flag. This flag will be removed in the
next major release of lit.

Author: ViktorTigerstrom

cmd/litcli/accounts.go

@@ -160,9 +160,10 @@ var updateAccountCommand = cli.Command{
 		},
 		cli.Int64Flag{
 			Name: "new_balance",
-			Usage: "The new balance of the account; -1 means do " +
-				"not update the balance.",
-			Value: -1,
+			Usage: "(deprecated) The new balance of the account; " +
+				"-1 means do not update the balance.",
+			Value:  -1,
+			Hidden: true,
 		},
 		cli.Int64Flag{
 			Name: "new_expiration_date",

docs/release-notes/release-notes-0.14.2.md

@@ -32,6 +32,13 @@
   allow increasing or decreasing the balance of an off-chain account by a
   specified amount.
 
+
+* The [`accounts update` `--new_balance` flag has been
+  deprecated](https://github.com/lightninglabs/lightning-terminal/pull/974).
+  Use the `accounts update credit` and `accounts update debit` commands
+  instead, to update an account's balance. The flag will no longer be
+  supported in Lightning Terminal `v0.16.0-alpha`.
+
 ## Integrated Binary Updates
 
 ### LND

litrpc/lit-accounts.pb.go

@@ -144,8 +144,12 @@ message UpdateAccountRequest {
     // The ID of the account to update. Either the ID or the label must be set.
     string id = 1;
 
-    // The new account balance to set. Set to -1 to not update the balance.
-    int64 account_balance = 2;
+    /*
+    Deprecated, use the `litcli update credit` or `litcli update debit`
+    commands instead. The new account balance to set. Set to -1 to not
+    update the balance.
+     */
+    int64 account_balance = 2 [deprecated = true];
 
     /*
     The new account expiry to set. Set to -1 to not update the expiry. Set to 0

litrpc/lit-accounts.proto

@@ -278,7 +278,7 @@
         "account_balance": {
           "type": "string",
           "format": "int64",
-          "description": "The new account balance to set. Set to -1 to not update the balance."
+          "description": "Deprecated, use the `litcli update credit` or `litcli update debit`\ncommands instead. The new account balance to set. Set to -1 to not\nupdate the balance."
         },
         "expiration_date": {
           "type": "string",