Add footer with creator acknowledgment

[aniketmaurya]

Added a footer to the README file acknowledging the creator.

Greptile Summary

This PR appends a centered footer to README.md that acknowledges the creator with a horizontal divider and the line "Built with 🧡 in London by Celesto AI", linking to https://celesto.ai.

The change is purely cosmetic/documentation — no source code, tests, or configuration are affected. The HTML style (<div align="center"> with an <a> tag) matches the existing patterns already established in the README (e.g., lines 7–17), so the addition maintains consistency with the file's style conventions. The footer contains no broken links, syntax errors, or formatting issues.

Confidence Score: 5/5

• This PR is safe to merge — it is a documentation-only change with no risk to functionality.
• The change touches only README.md and adds no code, build configuration, or functional logic. The footer uses HTML patterns that are already established throughout the README, ensuring consistency. There are no broken links, syntax errors, or formatting issues. The modification has zero impact on tests, builds, or runtime behaviour.
• No files require special attention

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[README.md] --> B[Header / Badges]
    A --> C[Features Table]
    A --> D[Quick Start]
    A --> E[Build & Deploy an Agent]
    A --> F[Agent Skills]
    A --> G[Create Agent from Markdown]
    A --> H[LiteMCP / MCP Server]
    A --> I[Agent-to-Agent Protocol]
    A --> J[Contributing]
    A --> K[License]
    K --> L["---<br/>Footer: Built with 🧡 in London by Celesto AI"]

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Context used:

• Rule from dashboard - AGENTS.md (source)

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