feat(ui5-shellbar): accessibility enhancements

[kgogov]

Description: to be added later..

[Copilot]

Pull Request Overview

This PR introduces accessibility enhancements for the ShellBar component, specifically to improve how branding information is conveyed via ARIA attributes.

• Added ARIA attributes for branding in the ShellBar template
• Introduced new type definitions and getter functions for branding accessibility
• Extended the ShellBar configuration to include a branding block for consistent accessibility data

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/fiori/src/ShellBarTemplate.tsx	Updated ARIA attributes for header and logo elements to include branding information
packages/fiori/src/ShellBar.ts	Added branding accessibility types, getter, and incorporated branding attributes in the configuration

Comments suppressed due to low confidence (1)

packages/fiori/src/ShellBarTemplate.tsx:32

• The fallback value for the aria-label in the header (using 'this.primaryTitle') differs from the combined logo's fallback ('this._logoAreaText'). Consider unifying the fallback text across components to ensure consistent accessibility behavior.

aria-label={this.accessibilityAttributes.branding?.name || this.primaryTitle}

[Copilot]

The branding 'role' attribute in the ShellBar configuration does not have a fallback if 'accessibilityAttributes.branding?.role' is undefined. Consider providing a default value (e.g. using a value similar to 'this.accLogoRole') to avoid potential undefined behavior.

Suggested change

	role: this.accessibilityAttributes.branding?.role,
	role: this.accessibilityAttributes.branding?.role || this.accLogoRole,