feat(VerticalNavigation): update to latest PD specs

[plagoa]

No description provided.

[Copilot]

Pull request overview

This PR updates HvVerticalNavigation to align with the latest Product Design specs. It introduces a new HvVerticalNavigationSection component, adds optional search functionality to the navigation tree, lifts open and selected state into the parent (with onOpenChange / onSelectedChange callbacks shared via context), and reworks several styles (group wrapper with grid-row transitions, level padding via CSS variables, theme tweaks for Pentaho, etc.).

Changes:

• New HvVerticalNavigationSection (with "See All / See Less" affordance) and updated index.ts exports.
• HvVerticalNavigation now propagates open/selected plus setters via context; HvVerticalNavigationTree gains a search prop with collapsed/expanded UX.
• Style refactor of VerticalNavigation/TreeViewItem (sibling separators with * + *, groupWrapper grid animation, level padding via CSS variables) and Pentaho theme adjustments.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
packages/core/src/VerticalNavigation/VerticalNavigation.tsx	Adds onOpenChange, selected, defaultSelected, onSelectedChange; mirrors props into local state and exposes setters via context.
packages/core/src/VerticalNavigation/VerticalNavigationContext.tsx	Adds setOpen, selected, setSelected to the context value.
packages/core/src/VerticalNavigation/VerticalNavigation.styles.tsx	Replaces :not(nav:first-of-type) selectors with * + * and simplifies first/collapsed paddings.
packages/core/src/VerticalNavigation/Navigation/Navigation.tsx	Adds search prop (input when open, icon button when collapsed), filtered leaves view, and integrates context-driven selection.
packages/core/src/VerticalNavigation/Navigation/Navigation.styles.tsx	Adds searchContainer, searchIcon, noResults styles.
packages/core/src/VerticalNavigation/NavigationPopup/NavigationPopupContainer.tsx	Wires useDefaultProps("HvVerticalNavigationPopup", …) for theme overrides.
packages/core/src/VerticalNavigation/Section/NavigationSection.tsx	New section component with mouse-enter popup and "See All/Less" pagination.
packages/core/src/VerticalNavigation/Section/NavigationSection.styles.tsx	Styles for the new section.
packages/core/src/VerticalNavigation/Section/index.ts	Re-exports the new section.
packages/core/src/VerticalNavigation/TreeView/TreeViewItem.tsx	Wraps icons in HvIconContainer, adds groupWrapper, exposes level padding via CSS var, repositions caret.
packages/core/src/VerticalNavigation/TreeView/TreeViewItem.styles.tsx	Adds groupWrapper grid-rows transition and gap/icon spacing changes.
packages/core/src/VerticalNavigation/index.ts	Exports the new Section and NavigationPopup modules.
packages/core/src/themes/pentaho.ts	Theme adjustments for new structure (* + * separators, popup container variable, expandable font weight, group offsets).
apps/docs/src/content/components/vertical-navigation.mdx	Adds a docs example demonstrating sections + search.