Starting docs with deve Quickstart

docs/developers/quickstart.md

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+## Quickstart for developers
+
+
+```mermaid
+
+sequenceDiagram
+
+    actor dev as Developer
+    participant vsc as Visual Studio Code
+    participant git as Github
+
+    dev ->>+ vsc: start IDE
+    Note right of vsc: Existing Git project
+    
+    vsc ->>+ git : 
+    Note right of vsc: Clone existing git for project
+    git -->>- vsc : Cloned
+
+
+
+    vsc -->>- dev : complete
+
+
+```
+