Watch: adds -w/--watch as a seconds-based alias for --dynamic-interval

Closes #2478

doc/help.json

@@ -83,6 +83,16 @@
                 "type": "num",
                 "default": 0
             }
+        },
+        {
+            "long": "watch",
+            "short": "w",
+            "desc": "Alias of dynamic-interval, but the value is in seconds instead of milliseconds. If no value is provided, it defaults to 1 second",
+            "arg": {
+                "type": "num",
+                "optional": true,
+                "default": 1
+            }
         }
     ],
     "Config": [

src/fastfetch.c

@@ -670,6 +670,12 @@ static void parseCommand(FFdata* data, char* key, char* value) {
         }
     } else if (ffStrEqualsIgnCase(key, "--dynamic-interval")) {
         instance.state.dynamicInterval = ffOptionParseUInt32(key, value); // seconds to milliseconds
+    } else if (ffStrEqualsIgnCase(key, "-w") || ffStrEqualsIgnCase(key, "--watch")) {
+        if (value == nullptr) {
+            instance.state.dynamicInterval = 1000; // default to 1 second if no value is provided
+        } else {
+            instance.state.dynamicInterval = ffOptionParseUInt32(key, value) * 1000; // seconds to milliseconds
+        }
     } else {
         return;
     }