fix(nav-drawer, blazor): fixing the IgbNavDrawer icon usage doc

[kdinev]

Closes #

Checklist:

• check topic's TOC/menu and paragraph headings
• Include TOC topic labels in the topic content when it has a valuable update, is new, or is considered preview / beta
• link to other topics using ./page.mdx or ../relative/path.mdx (.mdx extension required)
• at the References section at the end of the topic add links to topics, samples, etc
• reference API documentation instead of adding a section with API

• use valid component names - [Data] Grid, IgxSelectComponent, <igx-combo>
• use spell checker tool (VS Code, Grammarly, Microsoft Editor)
• add inline code blocks for the names of classes / tags / properties
• add language descriptor for the code blocks
• check if links function by running the check-api/mdx npm commands
• check if sample is working and fully visible in the topic
• check if sample is working and fully visible in the StackBlitz
• check if code blocks match the code in StackBlitz demo
• add or update meaningful llms.description metadata and run npm run check:llms-metadata

• follow SEO guidelines to fill topic's metadata (SEO guidelines)

• do not resolve requested changes (leave that to the reviewer)

[Copilot]

Pull request overview

Updates the Blazor documentation for IgbNavDrawer to properly include the required module registrations and to document/illustrate how IgbIcon icons from the material collection should be registered before use.

Changes:

• Expanded the Blazor AddIgniteUIBlazor(...) registration snippet to include IgbNavDrawerItemModule and IgbIconModule.
• Added guidance and sample code showing IgbIcon.RegisterIcon(...) usage for the material icon collection across the topic’s Blazor examples.
• Adjusted Blazor icon usage in examples to use a single @ref icon element for registration and simplified other icon instances.

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[damyanpetev]

The IgbNavDrawerModule should have the item and header included already IIRC;
So only that and the icon should be quite enough:

Suggested change

	typeof(IgbNavDrawerHeaderItemModule),
	typeof(IgbNavDrawerItemModule),
	typeof(IgbIconModule)
	typeof(IgbIconModule),

[damyanpetev]

Pretty sure the core is either not relevant for Blazor and/or can become an issue once we start breaking down those packages with Lite in the mix.
I'd also restrain from repeating the methodology and just go with "need to be registered, see topic". Again, due to the mechanism being a byproduct of generation, less than ideal and subject to change for the better :)
//2c

[damyanpetev]

(0.o)
Unrelated, but like.. the position style has no business on this component

Suggested change

	<IgbNavDrawer Open="true" style="position: relative">
	<IgbNavDrawer Open="true">