[IMP] energy_selfconsumption: invoicing acquired power

Trello cards:

• [A3] Facturació quotes recurrents per potència adquirida (contractes)
• [A3]-[A4]-[A5] UX-UI CONFIGURACIÓ FACTURACIÓ RECURRENT
• Incloure camp "Distribuidora" a la Fitxa de Projecte

Changelog

• [IMP] energy_project: added kw uom data. (Manually activation of UOM must be checked in general settings)
• [IMP] energy_selfconsumption: added contract, contract_variable_quantity, contract_queue_job and l10n_es dependency.
• [IMP] energy_selfconsumption: wizard for defining the invoicing mode of the project.
• [IMP] energy_selfconsumption: wizard for generation of contracts.
• [IMP] energy_selfconsumption: added reseller field to self-consumption project.
• [IMP] energy_selfconsumption: added smart button to self-consumption view to show contracts on active state

energy_project/data/uom_data.xml

+<?xml version="1.0" encoding="utf-8" ?>
+<odoo>
+    <data>
+        <record id="energy_uom_category" model="uom.category">
+            <field name="name">Energy</field>
+        </record>
+
+        <record id="kw_uom" model="uom.uom">
+            <field name="name">kW</field>
+            <field name="uom_type">reference</field>
+            <field name="category_id" ref="energy_uom_category" />
+            <field name="active">1</field>
+            <field name="rounding">0.01000</field>
+        </record>
+    </data>
+</odoo>