feat(kube): introduce custom templates [EE-1125] (#5434)

* feat(kube): introduce custom templates

refactor(customtemplates): use build option

chore(deps): upgrade yaml parser

feat(customtemplates): add and edit RC to kube templates

fix(kube): show docker icon

fix(custom-templates): save rc

* fix(kube/templates): route to correct routes

app/kubernetes/custom-templates/index.js

@@ -0,0 +1,61 @@
+import angular from 'angular';
+
+import { kubeCustomTemplatesView } from './kube-custom-templates-view';
+import { kubeEditCustomTemplateView } from './kube-edit-custom-template-view';
+import { kubeCreateCustomTemplateView } from './kube-create-custom-template-view';
+
+export default angular
+  .module('portainer.kubernetes.custom-templates', [])
+  .config(config)
+  .component('kubeCustomTemplatesView', kubeCustomTemplatesView)
+  .component('kubeEditCustomTemplateView', kubeEditCustomTemplateView)
+  .component('kubeCreateCustomTemplateView', kubeCreateCustomTemplateView).name;
+
+function config($stateRegistryProvider) {
+  const templates = {
+    name: 'kubernetes.templates',
+    url: '/templates',
+    abstract: true,
+  };
+
+  const customTemplates = {
+    name: 'kubernetes.templates.custom',
+    url: '/custom',
+
+    views: {
+      'content@': {
+        component: 'kubeCustomTemplatesView',
+      },
+    },
+  };
+
+  const customTemplatesNew = {
+    name: 'kubernetes.templates.custom.new',
+    url: '/new?fileContent',
+
+    views: {
+      'content@': {
+        component: 'kubeCreateCustomTemplateView',
+      },
+    },
+    params: {
+      fileContent: '',
+    },
+  };
+
+  const customTemplatesEdit = {
+    name: 'kubernetes.templates.custom.edit',
+    url: '/:id',
+
+    views: {
+      'content@': {
+        component: 'kubeEditCustomTemplateView',
+      },
+    },
+  };
+
+  $stateRegistryProvider.register(templates);
+  $stateRegistryProvider.register(customTemplates);
+  $stateRegistryProvider.register(customTemplatesNew);
+  $stateRegistryProvider.register(customTemplatesEdit);
+}