[13.0][ADD] report_dynamic - Lets Odoo users build reports

[thomaspaulb]

This new module allows Odoo users to create a report on any model without the need of a developer:

• Report content is a sequence of Jinja-capable HTML template blocks.
• Each block can be conditionally shown or hidden by evaluation of an Odoo domain or a Python expression.
• Aliases can be defined as shorthand expressions to more complicated ones. As the original requirement was for generating contracts, it also includes a macro for automatic section numbering (1.1, 1.2, 1.2.1 etc).
• For usage, the module adds a "More.." server action to generate the report from the record's form view.
• Multiple templates can exists per each model, and a domain expression can be defined on each template to define on which records it should apply. If the server action is called on a record and multiple report templates match the record, a popup comes to let the user choose which template to use.