Add Wazuh dashboard app build documentation

[rauldpm]

Wazuh version	Install type	Action performed	Platform
4.3	Wazuh dashboard app	Build	-

We need to add to the development documentation the corresponding section for the Wazuh dashboard app package generation in the same way that we provide the documentation generation for the Kibana or Splunk app.

• https://documentation.wazuh.com/current/development/packaging/generate-wazuh-splunk-app.html
• https://documentation.wazuh.com/current/development/packaging/generate-wazuh-kibana-app.html