feat(docs): update accordion xplat topic

[IMinchev64]

Closes #447

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)

[DiLazarova]

Accordion Component

Webcomponents = React = Blazor

The Structure for those 3 platforms remain the same.

1. Live Demo section is missing.
2. Add image to Do/Don’t subsection from Design Documentation

Link to Design Doc: https://www.infragistics.com/products/indigo-design/help/components/accordion#accordion-demo

I had problem loading Angular!

[DiLazarova]

Accordion Component

Webcomponents = React = Blazor

• Anatomy Section

1. The text describing the layout of the elements (1,2,3...) within the component's structure is missing. It can be taken from the design file: Figma Design File

Please, use the same color and font style for the text!

2. The image of the structure must be placed within the component's frame so that the proportions are correct

[IMinchev64]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Merged master into this branch. The merge was clean with no conflicts.

[IMinchev64]

@copilot why did you merge master into this branch, this branch targets vnext. Merging master did nothing

[Copilot]

@copilot why did you merge master into this branch, this branch targets vnext. Merging master did nothing

You're right — that was incorrect. I've now merged vnext into the branch (commit 148c4d846) and restored the accordion topic changes on top (commit 27cb83e34).