[IMP] web: Hoot - better test results

[jum-odoo]

This commit improves the readability and amount of informations displayed in the test results of the Hoot UI.

Previously: the message of each assertion result was a simple string;

Now: it can be an array of "normal" strings (tagged as "raw"), and any other value will be highlighted according to its type. Also, the amount of values displayed from an object (key-value pairs, iterable elements, etc.) has been increased to be able to show more details.

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[robodoo]