Start music plugin

- New plugin music
- Moved imports and util functions
- Pass base=0 to disable all base options

src/plugins/index.mjs

@@ -3,6 +3,7 @@
   import habits from "./habits/index.mjs"
   import languages from "./languages/index.mjs"
   import lines from "./lines/index.mjs"
+  import music from "./music/index.mjs"
   import pagespeed from "./pagespeed/index.mjs"
   import selfskip from "./selfskip/index.mjs"
   import traffic from "./traffic/index.mjs"
@@ -13,6 +14,7 @@
     habits,
     languages,
     lines,
+    music,
     pagespeed,
     selfskip,
     traffic,