Allow multiple addresses & contacts creation and linkage

[Aryan20]

Description

This update enhances CRM functionality by introducing support for multiple addresses and contacts, fixing the text editor field in side panel by using a textarea in the side panel, and fixing the “in” filter for Kanban column fields. It also adds Google Calendar sync fields for events, enables renaming for leads and opportunities, and provides a button to convert prospects into customers. Additionally, it improves access control by hiding the create button for users without permission.

Testing Instructions

• Create a customer from prospect
• Add multiple contacts to lead, opportunity, customer, prospect
• Add multiple addresses to lead, opportunity, customer, prospect
• Create event with and without Google calendar sync
• Open Kanban view and set a filter on the column field with "in" filter
• Add a field to sidepanel layout which is a text editor in ERP Next and check if it appears as text area
• Open CRM frontend from a user with read access but not create access and check the create button should be hidden

Checklist

• I have carefully reviewed the code before submitting it for review.
• This code is adequately covered by unit tests to validate its functionality.
• I have conducted thorough testing to ensure it functions as intended.
• A member of the QA team has reviewed and tested this PR (To be checked by QA or code reviewer)

References:
#74, #82, #83, #84, https://github.com/rtCamp/erp-rtcamp/issues/2075