improvement(sync): deprecate non-interactive sync stop command

Recommend to run it from inside dev console.

core/src/commands/sync/sync-stop.ts

@@ -13,6 +13,7 @@ import { dedent, naturalList } from "../../util/string.js"
 import type { CommandParams, CommandResult } from "../base.js"
 import { Command } from "../base.js"
 import { createActionLog } from "../../logger/log-entry.js"
+import { styles } from "../../logger/styles.js"
 
 const syncStopArgs = {
   names: new StringsParameter({
@@ -60,6 +61,15 @@ export class SyncStopCommand extends Command<Args, Opts> {
   async action(params: CommandParams<Args, Opts>): Promise<CommandResult<{}>> {
     const { garden, log, args } = params
 
+    if (!params.parentCommand) {
+      log.warn(
+        dedent`Behaviour of ${styles.command(
+          "sync stop"
+        )} is now deprecated and will be changed in a future breaking change release.
+        Instead we recommend running it ${styles.italic("inside")} the dev console.`
+      )
+    }
+
     // We default to stopping all syncs.
     const names = args.names || ["*"]