Merge tag 'v5.3.1' into ots-main

.github/PULL_REQUEST_TEMPLATE.md

.github/workflows/deploy-docs.yml

.github/workflows/hypha-ci.yml

.nvmrc

.pre-commit-config.yaml

.prettierignore

.python-version

.vscode/settings.json

Makefile

docs/getting-started/architecture.md

docs/references/workflows.md

docs/setup/administrators/configuration.md

docs/setup/deployment/stand-alone.md

hypha/apply/activity/forms.py

hypha/apply/activity/messaging.py

...vity/migrations/0077_remove_deleted_submission_actions.py

hypha/apply/activity/migrations/0078_activityattachment.py

hypha/apply/activity/models.py

hypha/apply/activity/options.py

...ply/activity/templates/activity/include/comment_form.html