feat: make select and multi-select tooltip hints keyboard and touch accessible

[coderabbitai]

Summary

Tooltip-mode hints in the select and multi-select form components need to be usable without a pointer device.

The generated demo currently uses non-focusable elements and hover-only visibility for these hint tooltips. Implement the accessibility behavior in the source component templates and regenerate the demo output.

Required changes

• Update the source templates that render tooltip-mode hints for SelectInput and MultiSelectInput.
• Use an accessible, focusable trigger while preserving the existing dropdown interaction behavior.
• Associate each trigger and tooltip with suitable ARIA semantics (for example, aria-describedby and role="tooltip").
• Reveal tooltip content for keyboard focus as well as hover.
• Ensure the interaction remains usable on touch devices.

Affected areas

• src/form/selectInput.templ
• src/form/multiSelectInput.templ
• Regenerated outputs, including docs/index.html

Acceptance criteria

• Tooltip-mode hints can be reached and read with keyboard-only navigation.
• Tooltip-mode hints remain available by pointer hover and usable on touch devices.
• The trigger and tooltip have appropriate ARIA relationships and tooltip semantics.
• Generated template files and demo output are regenerated after the source changes.

Backlinks

• Deferred from PR v0.1.7 #10: v0.1.7 #10
• Review discussion: v0.1.7 #10 (comment)
• Requested by @ntorga.