Created Mermaid Diagram (markdown)

Mermaid-Diagram.md

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+## Npm package
+
+- NPM package at https://www.npmjs.com/package/@liradb2000/markdown-it-mermaid
+
+## About examples
+
+- Below examples and more at https://mermaid-js.github.io/mermaid/#/examples
+
+## Howto
+
+- Add mermaid code to Wekan card or any other input field. After some time, if chart is not visible, reload Wekan webpage.
+- Mermaid code starts with `~~~mermaid`
+- Mermaid code ends with `~~~`
+
+## Example 1: Flowchart
+
+```
+~~~mermaid
+    graph TD
+    A[Client] --> B[Load Balancer]
+    B --> C[Server01]
+    B --> D[Server02]
+~~~
+```
+
+## Example 2: Pie Chart
+
+```
+~~~mermaid
+pie title NETFLIX
+         "Time spent looking for movie" : 90
+         "Time spent watching it" : 10
+~~~
+```
+
+## Example 3: Gantt Chart
+
+```
+~~~mermaid
+gantt
+    dateFormat  YYYY-MM-DD
+    title       Adding GANTT diagram functionality to mermaid
+    excludes    weekends
+    %% (`excludes` accepts specific dates in YYYY-MM-DD format, days of the week ("sunday") or "weekends", but not the word "weekdays".)
+
+    section A section
+    Completed task            :done,    des1, 2014-01-06,2014-01-08
+    Active task               :active,  des2, 2014-01-09, 3d
+    Future task               :         des3, after des2, 5d
+    Future task2              :         des4, after des3, 5d
+
+    section Critical tasks
+    Completed task in the critical line :crit, done, 2014-01-06,24h
+    Implement parser and jison          :crit, done, after des1, 2d
+    Create tests for parser             :crit, active, 3d
+    Future task in critical line        :crit, 5d
+    Create tests for renderer           :2d
+    Add to mermaid                      :1d
+
+    section Documentation
+    Describe gantt syntax               :active, a1, after des1, 3d
+    Add gantt diagram to demo page      :after a1  , 20h
+    Add another diagram to demo page    :doc1, after a1  , 48h
+
+    section Last section
+    Describe gantt syntax               :after doc1, 3d
+    Add gantt diagram to demo page      :20h
+    Add another diagram to demo page    :48h
+~~~
+```