chore(docs): added link to github sources (#DS-3565)

[artembelik]

No description provided.

[Copilot]

Pull request overview

This PR enhances the docs app by enabling “view source” links that point from a documentation item to its corresponding directory in the koobiq/angular-components GitHub repository (with a safe fallback to main for local dev builds).

Changes:

• Export a reusable dev placeholder version string and use it for build-token fallback.
• Extend the docs structure registry with an optional repository path per item (relative to repo root).
• Add a “Source code” link (with icon) to the component viewer navbar when a structure item has a source path.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
apps/docs/src/app/version.ts	Exports a shared dev-placeholder version and uses it for local build fallback.
apps/docs/src/app/structure.ts	Adds path?: string to structure items and populates it for many entries to support source linking.
apps/docs/src/app/services/i18n.ts	Adds a translation key for the “Source code” link label.
apps/docs/src/app/components/component-viewer/component-viewer.template.html	Renders a conditional external link to the GitHub source directory in the viewer header.
apps/docs/src/app/components/component-viewer/component-viewer.component.ts	Computes the GitHub tree URL based on the current docs version (or main in dev) and exposes githubSourceUrl.

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[rmnturov]

Выравнивание должно быть по правой стороне, а не к табам прижато. Если табов нет, то слева остается только ссылка на код

[artembelik]

Выравнивание должно быть по правой стороне, а не к табам прижато. Если табов нет, то слева остается только ссылка на код

@NikGurev @rmnturov поправил