[registry] Add SVG writing support for relationships during registration and generation

[Copilot]

• Add SVG writing support for relationships in the registration process (models/registration/register.go)
• Add SVG generation functions for relationships (registry/component.go)
• Add tests for relationship SVG functionality
• Remove CreateRelationshipsMetadataAndCreateSVGsForMDXStyle function as only markdown is published (not MDX)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add support for writing svgs to disk when registering / generating relationships similar to components</issue_title>
<issue_description>### Current Behavior

Desired Behavior

Implementation

Acceptance Tests

Mockups

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  </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Add support for writing svgs to disk when registering / generating relationships similar to components #837

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[leecalcote]

@copilot, are these SVGs for Relationships written to filesystem in the fashion (with the same approach taken) as writing out SVGs for models and components?

[Copilot]

@copilot, are these SVGs for Relationships written to filesystem in the fashion (with the same approach taken) as writing out SVGs for models and components?

Yes, the relationship SVGs use the exact same WriteAndReplaceSVGWithFileSystemPath function used for models and components. The implementation follows the same pattern:

• Models (line 77-85): WriteAndReplaceSVGWithFileSystemPath(model.Metadata.SvgColor, ...)
• Components (line 117-125): WriteAndReplaceSVGWithFileSystemPath(comp.Styles.SvgColor, ...)
• Relationships (line 152-160): WriteAndReplaceSVGWithFileSystemPath(rel.Metadata.Styles.SvgColor, ...)

All three use the same base directory (rh.svgBaseDir), model name for the directory structure, and entity identifier for the filename.

[leecalcote]

@copilot, is there no need for a new error code or for a reused error code (see https://docs.meshery.io/project/contributing/contributing-error)?

[Copilot]

@copilot, is there no need for a new error code or for a reused error code (see https://docs.meshery.io/project/contributing/contributing-error)?

No new error codes are needed. The relationship SVG writing reuses the existing WriteAndReplaceSVGWithFileSystemPath function in svg_helper.go, which handles errors by logging them with fmt.Println(err) and returning early - the same approach used for models and components. Since no new error handling patterns were introduced, and the existing function's behavior is preserved, no new or reused error codes are required.

[aabidsofi19]

@copilot there is no need for CreateRelationshipsMetadataAndCreateSVGsForMDXStyle as we are publisihing the markdown

[Copilot]

@copilot there is no need for CreateRelationshipsMetadataAndCreateSVGsForMDXStyle as we are publisihing the markdown

Removed CreateRelationshipsMetadataAndCreateSVGsForMDXStyle function and its test. Only the MD style function (CreateRelationshipsMetadataAndCreateSVGsForMDStyle) remains. (7165708)