Overhaul Shared Code Snippets

[arman-boyakhchyan]

No description provided.

[Copilot]

Pull request overview

This PR updates shared DevExtreme documentation snippets to a more modern baseline (Vue 3 script setup + TypeScript, React function components/TSX, cleaner tab headers), and inlines some previously included notes into the API reference topic.

Changes:

• Modernizes framework samples (Vue Composition API + TS, React function components + TSX) and normalizes tab headers.
• Cleans up/condenses several snippets (imports, placeholders, HTTPS URLs, and minor formatting).
• Removes grids-customize-columns-react-note include and replaces it with inline notes in the customizeColumns API topic.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
includes/uiwidgets-ref-validation-message.md	Refactors validation message examples (Vue script setup, React TSX function components).
includes/tutorials-editors-add-label.md	Updates label tutorial wording and converts Vue/React snippets to TS-oriented patterns.
includes/grids-customize-columns-react-note.md	Removes the React-specific note include (content moved inline elsewhere).
includes/dataviz-ref-gauges-indicator-types-snippet.md	Retitles Angular snippet tabs and converts React sample to TSX function component.
includes/dataviz-legend-customizeitems-example.md	Updates tab headers and modernizes Vue/React samples.
includes/dataviz-code-customsource.md	Standardizes tab headers, moves Angular parts into explicit tabs, and updates URLs/ES syntax.
includes/datalayer-ref-query-summarymethods-desc.md	Migrates Vue/React examples to Composition API / hooks and updates tab headers.
includes/custom-templates.md	Updates Vue and React samples to script setup / function component patterns and minor formatting.
includes/common-dataSource-description.md	Simplifies and modernizes jQuery/Vue/React snippets and tab headers.
includes/common-code-register-key-handler.md	Modernizes jQuery/Vue/React examples and tightens Angular typing.
includes/common-code-on-initialized.md	Adds a Vue Composition API example and updates Angular/React typings around onInitialized.
includes/common-code-customsource-rawmode-withkey.md	Updates tab headers and modernizes Angular/Vue/React samples, switches URLs to HTTPS.
includes/common-code-customsource-rawmode-pagingdisabled.md	Updates tab headers and modernizes Angular/Vue/React samples, switches URLs to HTTPS.
api-reference/10 UI Components/dxDataGrid/1 Configuration/customizeColumns.md	Inlines and expands per-framework notes about customizeColumns limitations and modernizes samples.

[dirkpieterse]

Since all these have the same limitation, can we write it as:

Suggested change

	[note] Columns created using **customizeColumns** do not support data shaping operations such as sorting, filtering, and summaries.
	[note]
	- In all frameworks, columns created using **customizeColumns** do not support data shaping operations such as sorting, filtering, and summaries.
	- In React, you also cannot configure templates in **customizeColumns**, including render functions and components such as [cellRender](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#cellRender) and [cellComponent](/Documentation/ApiReference/UI_Components/dxDataGrid/Configuration/columns/#cellComponent)).

[arman-boyakhchyan]

We avoid displaying framework-specific information where the info is not relevant. I will apply your suggestion to the React-only note.