Documentation Update: Open Source Information Goudete/update docs/hosted

[arpagon]

This PR updates the documentation related to hosted documentation, integrating changes from the following commits:

Original PR: Updating outdated or missing docs #430 (Author: @goudete)

• Cherry-picked commit d38f356 (Author: goudete, Date: Thu Nov 2 22:11:59 2023): This commit adds the "agents" page.
• Cherry-picked commit 38a423e (Author: goudete, Date: Wed Nov 1 23:06:51 2023): This commit adds the "inbound-calls" page.
• Cherry-picked commit e3d53a3 (Author: goudete, Date: Wed Nov 1 13:00:01 2023): This commit adds the "outbound call" reference.

These changes improve the hosted documentation and provide additional information to users.