The Mexican payroll localization has been reworked to better meet local authority requirements. This delivers a compliant payroll setup for full-time employment, with other employment cases planned separately.

This is a rework of the mexican localisation to make it compliant with the local
 authorities. In our case, it will be a working system only for the full-time
 jobs. The other cases will be coming separately.

Task: 3673251

CRM settings now include a link to Ringover, a partner browser extension for VoIP calling. This makes it easier for users to discover and set up calling integration from the most relevant app area.

We now partner with Ringover to provide VOIP capabilities using a browser extension for integration.

We add a link to that extension in the "integrations".

This is done in CRM because this is the most relevant app for VOIP usage.

task-4488082

The signing document viewer has been visually improved to reduce overlapping controls and make the signing flow easier to use. The side panel now appears on the right and selects the first option by default, helping users preview and complete documents more smoothly.

**Purpose
========**
This PR handles overriding the default PDF.js viewer styling to enhance the user experience while signing documents. 

Specifically, it addresses the issue where overlapping elements, such as the "Click to Start" prompt and the sign panel, create a visually unappealing interface.

**Specification
=========**
1. Moves the side panel to the right side of the viewer for improved accessibility.
2. Ensures the first option in the side panel is selected by default, simplifying the document preview process (refer to: https://link.excalidraw.com/l/65VNwvy7c4X/o1Mtd7yyXD).


**Screenshots
=========**

#### Before:
![image](https://github.com/user-attachments/assets/8ef795af-fddf-4849-a43e-5300b774a035)


#### After:
![image](https://github.com/user-attachments/assets/8356460c-9cbf-49f8-b78d-efe45463a20b)

__________________________________________________________________________________________________________
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task-id: 4369079

The Mexican payroll localization has been reworked to better align payroll calculations, rules, and accounting with local authority requirements. This helps businesses in Mexico process payroll more accurately and remain compliant with statutory obligations.

This is a rework of the mexican localisation to make it compliant with the local
 authorities.

 Task: 3673251

The Shopee sales module now includes its own app icon. This makes the module easier to recognize in Odoo and improves the visual consistency of the app list.

This commit introduces the app icon for the `sale_shopee` module.

task-4492921