Open plugin settings from a cog, with a tab per settings screen (#8675)

* feat(app): open plugin settings from a cog with a tab per screen

The plugin row shows a settings button next to its switch when the plugin
registers settings screens. The actions menu keeps Logs, Reload and Remove.
The settings page shows one tab per registered screen; a plugin with one
screen shows no tabs. Tabs swap screenId in place, so existing
plugins/[pluginId]/[screenId] links and openSettings keep working.

* fix(app): render settings tab icons inside the plugin's runtime

Component icons now mount under the installation provider, so plugin SDK
hooks such as useTranslation work. Each icon has its own error boundary;
an icon that throws leaves its tab with the label alone.

* feat(app): name only the plugin in its settings page header

The header shows the plugin's manifest name, or its id when it has none,
for single- and multi-screen plugins alike. The selected tab names the
screen. The Plugins page and the header share one plugin list query.

* feat(app): show plugin display names and a Settings tooltip on the cog

Plugin rows on Settings → Plugins show the manifest name, falling back to
the id; when a name is set, the id stays visible beneath it. The row's
controls, logs sheet, confirmations and feedback use the same name.
The cog is a ToolbarButton labeled Settings, with a matching tooltip.

plugin-examples/settings/README.md

@@ -1,7 +1,7 @@
 # Settings example
 
 Install this directory with `paseo plugin install /absolute/path/to/plugin-examples/settings`.
-Open Settings → Plugins → settings-example → Display, or run **Configure agent monitor** in Command Center.
+Open Settings → Plugins and press the settings button (cog) on the settings-example row, or run **Configure agent monitor** in Command Center.
 
 The select and switch save immediately. The title editor keeps a draft and its original revision,
 so another client's save produces a conflict instead of overwriting its changes. Close and reopen