[16.0][ADD] helpdesk_mgmt_livechat: add new module

[marcelsavegnago]

This module extends the helpdesk management functionality by allowing you to create tickets directly from livechat conversations.

Main Features

• Create Tickets from Livechat: Allows creating helpdesk tickets directly from livechat conversations using the /ticket command
• Chatbot Integration: Automatically creates tickets when chatbot reaches a "create_ticket" step
• Automatic Team Assignment: Configure chatbot steps to automatically assign tickets to specific helpdesk teams
• Conversation History: Automatically includes the full conversation history in the ticket description
• Ticket Counter: Displays the number of tickets generated by each chatbot directly in the chatbot view
• Channel Tracking: Automatically marks tickets created from livechat with the "Livechat" channel

Benefits

• Streamline customer support by creating tickets directly from chat conversations
• Automate ticket creation through chatbot workflows
• Keep complete conversation context in ticket descriptions
• Track tickets originated from livechat interactions
• Improve response time by converting chats to actionable tickets

Dependencies

This module requires:

• helpdesk_mgmt: Base helpdesk management module
• im_livechat: Odoo's livechat module

[marcelsavegnago]

cc @parzewski @douglascstd

[kaynnan]

LGTM