odoo/o-spreadsheet#6861

Created by BI, Vincent Schippefilt (vsc)

Blocked

label
odoo:master-standalone-vsc
head
69713933f40173b86d21379a8fcc3830fbdf622d
odoo/o-spreadsheet
master #6861 missing statuses missing r+

[ADD] electron: add fat client

Add the possibility for people to install o-spreadsheet on their computer as a fat client application.
To achieve this, we have:
- packaged spreadsheet into an Electron application.
- updated package.json to reflect the actual run-time dependencies
- added the different electron dependencies and electron-forge build system dependencies
- updated package.json to support the building and packaging of an electron app
- updated the release github action to build and publish the electron app
- added the base page for the electron app itself, with the capabilities to open/save spreadsheet files

task-4968109