[IMP] account: add search filter by amount on journal items

This change introduces a dedicated search filter for monetary values on account.move.line (Journal Items).
Previously, searching directly by an exact or minimum amount was not possible. This commit allows users to filter using syntax like 'balance >= 1000'.
To ensure comprehensive results, the filter checks the entered value against both the 'credit' and 'debit' fields simultaneously, guaranteeing that transactions matching the amount are returned regardless of whether they are recorded as a debit or a credit.
task-5231308

Author: jugurtha-gaci

addons/account/views/account_move_views.xml

@@ -306,6 +306,7 @@
                     <field name="name" string="Journal Item" filter_domain="[
                         '|', '|', '|',
                         ('name', 'ilike', self), ('ref', 'ilike', self), ('account_id', 'ilike', self), ('partner_id', 'ilike', self)]"/>
+                    <field name="balance" string="Amount" filter_domain="['|', ('debit', '&gt;=', self), ('credit', '&gt;=', self)]" />
                     <field name="name"/>
                     <field name="ref"/>
                     <field name="invoice_date"/>