add lrc plugin (#156)

* added lrc plugin to display lyrics of playing music

* added a small demonstration

* fixed the readme and added proper thumbnail

* added a demo

* trimmed up some deps and removed the demo

---------

Co-authored-by: shin01221 <mohamed@madin372.com>

lrc/widget.luau

@@ -0,0 +1,56 @@
+noctalia.setUpdateInterval(300)
+
+local fetching = false
+local mpdPlayer = "mpd"
+
+noctalia.runAsync("playerctl -l 2>/dev/null", function(r)
+  if r.exitCode == 0 then
+    for name in r.stdout:gmatch("[^\n]+") do
+      if name:match("^mpd%.") then
+        mpdPlayer = name
+        break
+      end
+    end
+  end
+end)
+
+function update()
+  if fetching then
+    return
+  end
+
+  if not noctalia.commandExists("lrc_tty") then
+    return
+  end
+
+  noctalia.runAsync("playerctl status --player " .. mpdPlayer .. " 2>/dev/null", function(r)
+    if r.exitCode == 0 and r.stdout:gsub("%s+$", "") == "Playing" then
+      fetchLyrics(mpdPlayer)
+      return
+    end
+    noctalia.runAsync("playerctl status --player spotify 2>/dev/null", function(r2)
+      if r2.exitCode == 0 and r2.stdout:gsub("%s+$", "") == "Playing" then
+        fetchLyrics("spotify")
+        return
+      end
+      barWidget.setText("")
+    end)
+  end)
+end
+
+function fetchLyrics(player)
+  fetching = true
+
+  noctalia.runAsync("lrc_tty --raw --player " .. player, function(r)
+    fetching = false
+
+    if r.exitCode == 0 then
+      local text = r.stdout:gsub("%s+$", "")
+      if #text > 0 and text ~= "(no lyrics)" then
+        barWidget.setText("| " .. text)
+        return
+      end
+    end
+    barWidget.setText("")
+  end,30000)
+end