chore: import upstream snapshot with attribution

plugins/now-playing.lua

@@ -0,0 +1,40 @@
+-- now-playing.lua — Write current track to /tmp for status bars (Waybar, Polybar, etc.)
+--
+-- The file at /tmp/cliamp-now-playing contains the current "Artist - Title"
+-- and is updated on every track change. Cleaned up on quit.
+
+local p = plugin.register({
+    name = "now-playing",
+    type = "hook",
+    description = "Write now-playing to /tmp for status bars",
+})
+
+local path = p:config("path") or "/tmp/cliamp-now-playing"
+
+p:on("track.change", function(track)
+    local title = track.title or ""
+    local artist = track.artist or ""
+    local text = title
+    if artist ~= "" then
+        text = artist .. " - " .. title
+    end
+    cliamp.fs.write(path, text)
+    cliamp.log.info("Now playing: " .. text)
+
+    -- Desktop notification via mako/notify-send.
+    if artist ~= "" then
+        cliamp.notify(title, artist)
+    else
+        cliamp.notify(title)
+    end
+end)
+
+p:on("playback.state", function(ev)
+    if ev.status == "stopped" then
+        cliamp.fs.write(path, "")
+    end
+end)
+
+p:on("app.quit", function()
+    cliamp.fs.remove(path)
+end)