Add notification documentation

[nscuro]

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[Copilot]

Pull request overview

This PR expands the documentation set around Dependency-Track notifications (alerts, publishers, filtering, templates) and updates site configuration/assets to support the new pages and screenshots.

Changes:

• Add new notifications docs (tutorial, user/administration guides, and reference pages) and wire them into navigation.
• Standardize/relocate many screenshots to docs/assets/images/... and adjust image links across several pages.
• Add the MkDocs glightbox plugin plus CSS tweaks to improve screenshot presentation.

Reviewed changes

Copilot reviewed 26 out of 62 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
uv.lock	Adds mkdocs-glightbox and its dependency chain (incl. selectolax).
pyproject.toml	Pins mkdocs-glightbox==0.5.1 for the docs build environment.
mkdocs.yml	Enables the glightbox MkDocs plugin.
docs/tutorials/setting-up-notifications.md	New tutorial walking through creating a console-backed alert and triggering BOM_PROCESSED.
docs/tutorials/.pages	Adds quick start + notifications tutorial to tutorials navigation.
docs/stylesheets/extra.css	Adds consistent styling for raster images (borders/shadows, slate background tweak).
docs/reference/notifications/templating.md	New reference page describing template context variables, filters, and restrictions.
docs/reference/notifications/publishers.md	Adds SSRF/local-connection restrictions section and updates screenshot paths + wording.
docs/reference/notifications/groups.md	Refines group descriptions/headings and adds a group→subject mapping table.
docs/reference/notifications/filter-expressions.md	Reworks filter expression docs and updates screenshots/links to the new “how filtering works” section.
docs/reference/notifications/.pages	Adds “Templating” to notifications reference navigation.
docs/reference/analyzers.md	Updates analyzer screenshot paths to the docs/assets/images/... layout.
docs/images/reference/expression-condition.png	Included asset in the PR (used for docs imagery).
docs/guides/user/managing-vulnerability-policies.md	Updates guide screenshot paths to the new asset layout.
docs/guides/user/managing-secrets.md	Updates guide screenshot paths to the new asset layout.
docs/guides/user/configuring-notifications.md	New user guide for creating and scoping notification alerts (projects/tags/schedules/filters).
docs/guides/user/.pages	Adds “configuring notifications” to user guide navigation.
docs/guides/administration/migrating-from-v4.md	Updates migration guide screenshot paths to the new asset layout.
docs/guides/administration/managing-notification-templates.md	New admin guide for cloning/editing/deleting notification templates.
docs/guides/administration/debugging-notifications.md	New admin guide describing common delivery failures and log-based diagnosis.
docs/guides/administration/configuring-database.md	Updates PGTune screenshot path to the new asset layout.
docs/guides/administration/.pages	Adds the new notification admin guides to administration navigation.
docs/concepts/time-series-metrics.md	Updates screenshot path to the new asset layout.
docs/concepts/notifications.md	Refreshes notifications concepts; adds explicit “how alert filtering works” ordering + fail-open behavior.
docs/concepts/architecture/design/notifications.md	Improves wording/clarity for outbox emission/relay/publishing sections.
docs/assets/images/tutorials/setting-up-notifications/login.png	New tutorial screenshot.
docs/assets/images/tutorials/setting-up-notifications/create-alert.png	New tutorial screenshot.
docs/assets/images/reference/notifications/publishers/jira-publisher-global-config.png	Adds/updates a reference screenshot asset.
docs/assets/images/guides/user/managing-secrets/use-secret.png	Adds/updates a guide screenshot asset.
docs/assets/images/guides/user/managing-secrets/delete-secret.png	Adds/updates a guide screenshot asset.
context/vocabulary.md	Adds/clarifies canonical terminology for publishers vs notification templates.
AGENTS.md	Documents the “assets/images mirrors docs tree” convention.
.vale/styles/config/vocabularies/DependencyTrack/accept.txt	Adds accepted terms needed by the new docs (e.g., loopback, crontab, misconfigured).

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