Docs: strategies for adopting Backstage (#2092)

* Adopting guidelines

* More updates

* Tactics

* Add metrics

* Add MTTR

microsite/i18n/en.json

@@ -177,6 +177,9 @@
       "journey": {
         "title": "journey"
       },
+      "overview/adopting": {
+        "title": "Strategies for adopting"
+      },
       "overview/architecture-overview": {
         "title": "Architecture overview"
       },
@@ -208,7 +211,7 @@
         "title": "Existing plugins"
       },
       "plugins/index": {
-        "title": "Intro"
+        "title": "Intro to plugins"
       },
       "plugins/plugin-development": {
         "title": "Plugin Development in Backstage"

microsite/sidebars.json

@@ -5,7 +5,8 @@
       "overview/architecture-overview",
       "overview/architecture-terminology",
       "overview/roadmap",
-      "overview/vision"
+      "overview/vision",
+      "overview/adopting"
     ],
     "Getting Started": [
       "getting-started/index",