Feature: Autocomplete Selection field values in Python comparisons

[Alvix11]

When comparing a fields.Selection field value in Python code,
it would be useful to have autocompletion suggest the valid
selection values.

Example

Given a field like:

payment_state = fields.Selection([
    ('not_paid', 'Not Paid'),
    ('in_payment', 'In Payment'),
    ('paid', 'Paid'),
    ('partial', 'Partially Paid'),
])

When writing:

if move.payment_state == "pa"

The LSP should suggest: paid, partial

Why

It avoids having to go to the field definition (gd)
every time you need to know the valid values of a Selection field.
This would speed up development significantly.

Environment

• odoo_ls_server version: 1.2.0
• Editor: Neovim + NvChad