Add iPerf Speed Test to dashboards (#926)

* Add iPerf Speed Test to dashboards

* Add suggestions from unnamedd

Co-authored-by: Thiago Holanda <unnamedd@gmail.com>

* Rename iperf-speed-test.sh to iperf-speed-test.template.sh

---------

Co-authored-by: Thiago Holanda <unnamedd@gmail.com>

commands/dashboards/iperf-speed-test.template.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Dependency: This script requires `iPerf` to be installed: https://iperf.fr/iperf-download.php
+# Install via homebrew: `brew install iperf`
+
+# Required parameters:
+# @raycast.schemaVersion 1
+# @raycast.title Speed Test
+# @raycast.mode inline
+# @raycast.refreshTime 1h
+# @raycast.packageName iPerf
+
+# Optional parameters:
+# @raycast.icon 💾
+
+# Documentation:
+# @raycast.description Runs an iPerf Speed Test.
+# @raycast.author Sam Wright
+# @raycast.authorURL https://raycast.com/samywamy10
+
+# Add the IP address of your iPerf server here
+ip_address='192.168.86.44'
+
+if ! command -v iperf &> /dev/null; then
+    echo "iperf command is required ('brew install iperf' or https://iperf.fr/iperf-download.php).";
+    exit 1;
+fi
+
+{ iperf3 -c $ip_address | grep 'sender' | tail -n 1 | awk '{print $7 " " $8}' && date +'%-I:%M%p'; } | tr '\n' ' ' | awk '{$3="@ "$3; print $0}'
+