[ADD] add `project_timesheet_funding_wish` addon

adds in the timesheet lines:
- ``funding wish`` field: user tells if we want to be paid for the
time spent
- ``treated`` field: tells if the timesheet line has been considered
in internal invoicing process

Task: JOI-13

project_timesheet_funding_wish/views/hr_timesheet.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="hr_timesheet_line_tree_funding_view" model="ir.ui.view">
+        <field name="name">hr.timesheet.line.tree.funding.view</field>
+        <field name="model">account.analytic.line</field>
+        <field name="inherit_id" ref="hr_timesheet.hr_timesheet_line_tree" />
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='date']" position="after">
+                <field name="treated" />
+                <field name="funding_wish" />
+            </xpath>
+        </field>
+    </record>
+</odoo>