Refine notification center and configure native notifications

Keep notification actions and dismiss controls visible, compact and animate history, and add themed icon controls and grouping.

Include notification settings, session integration and documentation, on-demand workspaces, and performance baseline notes.

shell/ferese-shell/assets/icons/status/chevron-up.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="m5 15 7-7 7 7"/></svg>

shell/ferese-shell/assets/icons/status/close.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round"><path d="m6 6 12 12M18 6 6 18"/></svg>

shell/ferese-shell/assets/icons/status/trash.svg

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+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round"><path d="M4 7h16M9 7V4h6v3M6 7l1 13h10l1-13M10 11v5M14 11v5"/></svg>