feat(cxl-lumo-styles): vaadin-context-menu-item[theme="cxl-context-menu-section-header"]

[pawelkmpt]

https://app.clickup.com/t/8677bqqg1

TODO: remove hover state style for section header

[github-actions[bot]]

size-limit report 📦

Path	Size
packages/cxl-ui/pkg/dist-web/cxl-ui.js	72.39 KB (+0.07% 🔺)
packages/cxl-ui/pkg/dist-web/cxl-ui-jwplayer.js	11.89 KB (0%)
packages/cxl-ui/pkg/dist-web/cxl-ui-playbooks.js	29.09 KB (+0.16% 🔺)
packages/cxl-ui/pkg/dist-web/vendor.js	140.5 KB (0%)
packages/cxl-ui/pkg/dist-web/cxl-ui-jwplayer.js, packages/cxl-ui/pkg/dist-web/cxl-ui-playbooks.js, packages/cxl-ui/pkg/dist-web/cxl-ui.js, packages/cxl-ui/pkg/dist-web/manifest.js, packages/cxl-ui/pkg/dist-web/unresolved.js, packages/cxl-ui/pkg/dist-web/vendor.js	255.03 KB (+0.04% 🔺)

[pawelkmpt]

@anoblet I need your help here. I'd like to remove hover effect from Minidegrees header.

<vaadin-context-menu-item class="vaadin-menu-item" theme="cxl-context-menu-section-header">
    Minidegrees
</vaadin-context-menu-item>