[AAE-12782] Custom theme creation (#8450)

* [AAE-12782] Create custom theme

* copied ui from ACA

* fix some lints

* Added theme

* Added theme

* lint part 1

* lint part 2

* lint part 3 backg color

* lint part 4

* lint part 5

* lint part 6

* lint part 7

* update

* fix map_merge

lib/core/ng-package.json

@@ -2,6 +2,11 @@
   "$schema": "../../node_modules/ng-packagr/ng-package.schema.json",
   "dest": "../../dist/libs/core",
   "assets": [
+    {
+      "glob": "custom-theme/**/*",
+      "input": "./",
+      "output": "/"
+    },
     {
       "glob": "assets/**/*",
       "input": "./src/lib",