Support for reading SVG files

## Issue:
The source code of SVG files cannot be edited or viewed at the moment (v2025.1.3 ...).

## Request
In some cases, it's necessary to have access to a preview of SVG elements in the sidebar. Editing them or creating files with the `.svg` extension from scratch should be possible at the same time.

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**Usecase**:
+ Media editing.
+ Working with icon libraries.
+ Web design with svg files.

