chore(icons): add functions icon (#416)

* chore(icons): add functions icon

* v2.6.4

Author: burbuli8ra

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@netdata/netdata-ui",
-  "version": "2.6.3",
+  "version": "2.6.4",
   "description": "netdata UI kit",
   "main": "./lib/index.js",
   "files": [

src/components/icon/assets/functions.svg

@@ -88,6 +88,7 @@ import feed from "./assets/feed.svg"
 import filterList from "./assets/filterList.svg"
 import forcePlay from "./assets/force_play.svg"
 import forcePlayOutline from "./assets/force_play_outline.svg"
+import functions from "./assets/functions.svg"
 import gear from "./assets/gear.svg"
 import github from "./assets/github.svg"
 import goToNode from "./assets/go_to_node.svg"
@@ -384,6 +385,7 @@ export const iconsList = {
   firewallSolid,
   forcePlay,
   forcePlayOutline,
+  functions,
   gear,
   github,
   google,