feat(backstage-doc): added techdoc skeleton occording to https://backstage.io/docs/features/techdocs/creating-and-publishing

docs/index.md

@@ -0,0 +1,133 @@
+# Doc
+
+```plantuml
+@startuml
+title Login Sequence
+    ComponentA->ComponentB: Login Request
+    note right of ComponentB: ComponentB logs message
+    ComponentB->ComponentA: Login Response
+@enduml
+```
+
+## hello mock docs
+
+!!! test
+Testing something
+
+Abbreviations:
+Some text about MOCDOC
+
+This is a paragraph.
+{: #test_id .test_class }
+
+Apple
+: Pomaceous fruit of plants of the genus Malus in
+the family Rosaceae.
+
+```javascript
+import { test } from 'something';
+
+const addThingToThing = (a, b) a + b;
+```
+
+- [abc](#abc)
+- [xyz](#xyz)
+
+## abc
+
+This is a b c.
+
+## xyz
+
+This is x y z.
+
+# The attack plan
+
+{% dot attack_plan.svg
+    digraph G {
+        rankdir=LR
+        Earth [peripheries=2]
+        Mars
+        Earth -> Mars
+    }
+%}
+
+```graphviz dot attack_plan.svg
+digraph G {
+    rankdir=LR
+    Earth [peripheries=2]
+    Mars
+    Earth -> Mars
+}
+```
+
+# PlantUML Samples
+
+```plantuml classes="uml myDiagram" alt="Diagram placeholder" title="My diagram"
+@startuml
+  Goofy ->  MickeyMouse: calls
+  Goofy <-- MickeyMouse: responds
+@enduml
+```
+
+# Emojis
+
+:bulb: :smile:
+
+# Code blocks
+
+```javascript
+import { test } from 'something';
+
+const addThingToThing = (a, b) a + b;
+```
+
+# Grouped Code blocks
+
+=== "JavaScript"
+
+    ```javascript
+    import { test } from 'something';
+
+    const addThingToThing = (a, b) a + b;
+    ```
+
+=== "Java"
+
+    ```java
+    public void function() {
+        test();
+    }
+    ```
+
+```java tab="java"
+    public void function() {
+      test();
+    }
+```
+
+```java tab="java 2"
+    public void function() {
+      test();
+    }
+```
+
+# MDX truly sane lists
+
+- attributes
+
+- customer
+  - first_name
+    - test
+  - family_name
+  - email
+- person
+  - first_name
+  - family_name
+  - birth_date
+- subscription_id
+
+- request
+
+<!-- prettier-ignore -->
+*[MOCDOC]: Mock Documentation