feat(port): add vivid port

[arrrgi]

Description

This PR: Adds support for vivid, an LS colorizer written in Rust.

Assets

Checklist

• PR description included
• I've read the documents
• I've created or commented in an issue related to this port asking to work on it
• I know I shouldn't change any files in the packages folder manually
• I've added this port at the end of the related category list in the main README
• I've attached an image to the icon of the app that this port is related to
• I've attached a screenshot with a good zoom in fullscreen showing this port in action

PR Submitter Notes

1. Regarding CLI and Syntax highlighter ports #244 - I have not added this to the Aura Theme README as it deserves it's own section
2. The vivid CLI app does not provide an icon/logo
3. I also haven't included the preview in the main README as these are stored in your 'assets' repo

[Copilot]

Pull request overview

This PR adds support for Vivid, a Rust-based LS colorizer for terminal output, with both Dark and Dark Soft theme variants.

• Implements theme templates for Vivid with comprehensive file type and directory styling configurations
• Adds installation documentation with two options: bundled themes and manual installation
• Generates output files in the packages/vivid directory for distribution

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
src/ports/vivid/index.ts	TypeScript implementation to generate Vivid theme files from templates, including color hash stripping logic
src/ports/vivid/templates/aura-theme-dark.yml	Template for dark variant theme with accent color mappings and file type styling rules
src/ports/vivid/templates/aura-theme-dark-soft.yml	Template for dark soft variant with muted colors and identical styling structure
src/ports/vivid/templates/README.md	Installation instructions template with curl commands and shell configuration examples
packages/vivid/aura-theme-dark.yml	Generated dark theme output file with resolved color values
packages/vivid/aura-theme-dark-soft.yml	Generated dark soft theme output file with muted color values
packages/vivid/README.md	Generated installation documentation with contributor information

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