fix: make rate limiting opt-in by removing default value

Remove the default value of 3 seconds for --rate-limit flag to ensure
rate limiting is only active when explicitly requested by the user.
This allows requests to execute immediately without queuing when the
flag is not provided.

Signed-off-by: leocavalcante <[email protected]>

Author: leocavalcante

src/start.ts

@@ -156,15 +156,14 @@ export const start = defineCommand({
     "rate-limit": {
       alias: "r",
       type: "string",
-      default: "3",
       description: "Rate limit in seconds between requests",
     },
     wait: {
       alias: "w",
       type: "boolean",
       default: false,
       description:
-        "Wait instead of error when rate limit is hit. Has no effect if rate limit is not set",
+        "Wait instead of error when rate limit is hit. Only applies when --rate-limit is set",
     },
     "github-token": {
       alias: "g",