feat: Upgrade to Quince

[hinakhadim]

Here are my notes of upgrade process for #48 :

• Installed Tutor quince branch.
• Installed the plugin from source, and checkout a branch quince.
• Merged changes (if any) from the plugin nightly branch.
• In the plugin’s setup.py, bumped the version of the “tutor” package that the plugin depends on.
• In the about.py module, bumped the version number to the next major release (in our case: “v17.0.0”).
• Enabled the plugin.
• Built all the tutor images locally tutor config save && tutor images build all.
• Replaced all instances of the previous release name (“palm”) by the new one (“quince”) in the entire repo: git grep -i palm.
• Did basic testing to check its working correctly