feat(icons): added audio-lines-off icon (#4589)

* Added icons/audio-lines-off.svg

* Added icons/audio-lines-off.json

* fix(icons/audio-lines-off): fill in metadata

* Apply suggestions from code review

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

---------

Co-authored-by: Eric Fennis <eric.fennis@gmail.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

icons/audio-lines-off.json

@@ -0,0 +1,55 @@
+{
+  "$schema": "../icon.schema.json",
+  "contributors": [
+    "danielbayley",
+    "karsa-mistmere"
+  ],
+  "use-cases": [
+    "indicating that audio levels, playback, or monitoring are turned off",
+    "showing muted sound, silenced voice activity, or disabled audio output",
+    "marking controls that pause waveform visualization or stop live audio analysis",
+    "representing inactive music, radio, broadcast, or voice signal displays",
+    "identifying settings that disable sound processing, hearing feedback, or media levels",
+    "showing a muted microphone during voice or video calls",
+    "indicating speaker or headphone output is disabled in system audio controls",
+    "marking disabled waveform or spectrum visualization in audio editors and daws",
+    "showing that sound notifications or alerts are silenced"
+  ],
+  "tags": [
+    "audio",
+    "sound",
+    "noise",
+    "mute",
+    "silence",
+    "off",
+    "disabled",
+    "inactive",
+    "listen",
+    "hearing",
+    "equalizer",
+    "equaliser",
+    "hertz",
+    "frequency",
+    "wavelength",
+    "vibrate",
+    "sine",
+    "waveform",
+    "synthesizer",
+    "synthesiser",
+    "levels",
+    "track",
+    "music",
+    "playback",
+    "radio",
+    "broadcast",
+    "airwaves",
+    "voice",
+    "vocals",
+    "singer",
+    "song"
+  ],
+  "categories": [
+    "multimedia",
+    "communication"
+  ]
+}

icons/audio-lines-off.svg

@@ -0,0 +1,21 @@
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+>
+  <path d="M10 10v11" />
+  <path d="M10 3v1.35" />
+  <path d="M14 14v1" />
+  <path d="M14 8v.35" />
+  <path d="M18 5v7.35" />
+  <path d="M2 10v3" />
+  <path d="m2 2 20 20" />
+  <path d="M22 10v3" />
+  <path d="M6 6v11" />
+</svg>