Review and Address the identified High-impact quality risks

[dessyordanova]

https://progresssoftware.atlassian.net/browse/DTC-135

[Copilot]

Pull request overview

This PR updates multiple WinForms documentation pages to reduce “high-impact quality risks” by rewriting introductions/metadata, restructuring sections, and adding clearer step-by-step guidance for common tasks (licensing setup, control usage, formatting, etc.).

Changes:

• Expanded and modernized several articles with clearer conceptual overviews, step sequences, and troubleshooting guidance (notably licensing and getting started).
• Standardized headings, captions, and “See Also” sections across multiple control/topic pages.
• Added/updated examples and clarifications for common formatting and UI scenarios (TPF HTML-like formatting, GridView filtering/row numbers, RadDock overview, RadChat message types).

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
telerik-presentation-framework/html-like-text-formatting.md	Restructures the HTML-like formatting article and expands examples/tags reference.
licensing/license-key.md	Reworks licensing instructions with activation paths for NuGet/non-NuGet + CI and troubleshooting.
introduction.md	Refreshes the documentation landing page with updated positioning and resource links.
getting-started/first-steps.md	Updates the first-steps walkthrough (trial/licensing, NuGet feed, package install, RadGridView binding).
controls/listview/views.md	Clarifies RadListView view modes and adds a DetailsView “how-to” + links.
controls/gridview/visual-elements/cells/formating-examples/row-numbers.md	Improves the row-numbering guidance incl. paging behavior and header width.
controls/gridview/features/filtering/filtering-row.md	Expands filtering row guidance with practical usage and menu customization notes.
controls/dropdown-listcontrol-and-checkeddropdownlist/dropdownlist/getting-started.md	Rewrites RadDropDownList getting-started into a scenario-based walkthrough.
controls/dock/overview.md	Refreshes RadDock overview with clearer feature grouping and learning resources.
controls/chat/chat-items/messages.md	Reorganizes RadChat message types content with clearer “when to use” guidance and references.

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