Replace badges with shieldcn.dev versions

[sarathsomana]

Description

This pull request updates the badges in the README.md to use a new badge provider and adds an attribution section. The changes modernize the appearance of the badges and properly credit the badge source.

Badge updates:

• Replaced existing Shields.io badges with new badges from shieldcn.dev, updating the style, color, and icons for the license, skills count, and architecture sections.
• Added a new CI status badge from shieldcn.dev to display build status.

Documentation:

• Added an "Attributions" section to credit shieldcn.dev as the badge provider.Updated badges in the README to use shieldcn.dev for better visuals and consistency.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New skill (adds a new skill to the repository)
• Skill improvement (enhances an existing skill)
• Documentation update

Checklist:

• I have performed a self-review of my own code/prompts.
• I have made corresponding changes to the README.md (if adding a new skill).
• My changes generate no new warnings or errors in the agent's execution.