feat: configurable badge and logo for article sidebar and issue TOC (Issue #27)

[subhanLabs]

Closes #27

Adds a Badge / Logo setting in the plugin settings allowing journal managers to choose how CODECHECK is displayed on the article landing page sidebar and the issue table of contents.

Options:

• CODE WORKS badge (default)
• CODECHECK logo
• Own image via custom URL (recommended: approx. 134×24px)
• No badge (text only , displays a plain "CODECHECK" label, linked to the certificate when available)

Changes:

• New codecheckBadgeType and codecheckBadgeCustomUrl plugin settings
• Badge selection is applied consistently on both the article landing page sidebar and the issue table of contents
• The CODECHECK logo is displayed at a slightly larger height than the CODE WORKS badge to account for its different aspect ratio
• Text-only mode links to the certificate when one exists, otherwise renders as a plain label

Screenshots:

[nuest]

@subhanLabs Converted to draft so you can work on the scaling / image height form. For demonstration purposes, I recommend using a shields.io URL for a badge that looks completely different, e.g.:

https://img.shields.io/badge/WORKFLOW-reviewed_and_executed-22ee99 gives you

[subhanLabs]

@subhanLabs Converted to draft so you can work on the scaling / image height form. For demonstration purposes, I recommend using a shields.io URL for a badge that looks completely different, e.g.:

https://img.shields.io/badge/WORKFLOW-reviewed_and_executed-22ee99 gives you

Height option is added in the settings, by default the size will be 24.

[nuest]

@subhanLabs please resolve the merge conflicts, then I'll review. Thanks!

[nuest]

@subhanLabs I did the merge - always risky ! Please check after the merge if the badge config still works.