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.

cmd/litcli/accounts.go

@@ -162,8 +162,8 @@ var updateAccountCommand = cli.Command{
 		},
 		cli.Int64Flag{
 			Name: "new_balance",
-			Usage: "The new balance of the account; -1 means do " +
-				"not update the balance.",
+			Usage: "(deprecated) The new balance of the account; " +
+				"-1 means do not update the balance.",
 			Value: -1,
 		},
 		cli.Int64Flag{

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

@@ -24,6 +24,14 @@
   specified amount.
 
 ### Technical and Architectural Updates
+
+## RPC Updates
+
+* The [`accounts update` `--new_balance` flag has been
+  deprecated](https://github.com/lightninglabs/lightning-terminal/pull/974).
+  Use the `accounts credit` and `accounts debit` commands instead, to update
+  an account's balance. The flag will no longer be supported in Lightning
+  Terminal `v0.15.0-alpha`.
 
 ## Integrated Binary Updates
 

litrpc/lit-accounts.proto

@@ -144,7 +144,10 @@ 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.
+    /*
+    Deprecated, use credit or debit command instead. The new account balance to
+    set. Set to -1 to not update the balance.
+     */
     int64 account_balance = 2;
 
     /*

litrpc/lit-accounts.swagger.json

@@ -156,7 +156,7 @@
         "account_balance": {
           "type": "string",
           "format": "int64",
-          "description": "The new account balance to set. Set to -1 to not update the balance."
+          "description": "Deprecated, use credit or debit command instead. The new account balance to\nset. Set to -1 to not update the balance."
         },
         "expiration_date": {
           "type": "string",

proto/lit-accounts.proto

@@ -144,7 +144,10 @@ 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.
+    /*
+    Deprecated, use credit or debit command instead. The new account balance to
+    set. Set to -1 to not update the balance.
+     */
     int64 account_balance = 2 [jstype = JS_STRING];
 
     /*