Tutor

- [Improvement] Auto-completion of `plugins` and `config` arguments: `plugins enable/disable NAME`, `plugins install PATH`, `config save --set KEY=VAL`, `config save --unset KEY`, `config printvalue KEY`. (by regisb)
- [Bugfix] Fix minimum click version (>= 8.0.0) when installing tutor from pip.
- [Improvement] Enable CORS by default for both LMS and CMS by moving those settings to the `common_all` partial. (by arbrandes)

- [Improvement] Auto-complete implicit `local/dev --mount /path/to/...` options. (by regisb)
- 💥[Feature] Strong typing of action and filter hooks: this allows us to detect incorrect calls to `actions.add` or `filters.add` early. Strong typing forces us to break the `do` and `apply` API by removing the `context` named argument. Developers should replace `do(context=...)` by `do_from_context(..., )` (and similar for `apply`).

- [Security] Fix edx-platform XSS vulnerability on "next" parameter. (by regisb)

- [Deprecation] Tutor is no longer compatible with Python 3.6. (by regisb)
- [Security] Fix xblock ajax handler vulnerability. (by regisb)
- [Improvement] Use web proxy gzip encoding to improve bandwidth. We observe a 75% size reduction on the LMS dashboard. (by ghassanmas)

- [Improvement] Upgrade Scorm XBlock to v14.0.0. (by regisb)
- 💥[Improvement] The Richie plugin was transferred to the Openfun organization; thus, it is no longer officially supported and it is removed from the default set of plugins that ships with `pip install tutor[full]` or the Tutor pre-compiled binary. Users are encouraged to uninstall the `tutor-richie` Python package and install the `tutor-contrib-richie` package instead.
- [Feature] Upgrade edx-platform i18n strings to nutmeg.2. (by regisb)

- [Bugfix] Fix MongoDB replica set connection error resulting from edx-platform's pymongo (3.10.1 -> 3.12.3) upgrade ([edx-platform30569](https://github.com/openedx/edx-platform/pull/30569)). (by ormsbee)
- [Feature] Upgrade all applications to open-release/nutmeg.2. (by BbrSofiane)