fix(docs): add centered logo, header, and badges to README (#92)

## Summary
- Added the **AgentControl Black Logomark** image at the top of the
README
- Center-aligned the logo, the "Agent Control" heading, and all badge
tags using HTML `<p align="center">` and `<h1 align="center">`

## Test plan
- [ ] Verify the logo renders correctly on the GitHub README page
- [ ] Confirm the heading and badges are centered
- [ ] Check that all badge links still work

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: siddhant-galileo <siddhant@galileo.ai>

Author: 3 people

README.md

@@ -1,11 +1,26 @@
-# Agent Control
-
-[![License](https://img.shields.io/badge/License-Apache_2.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
-[![Python 3.12+](https://img.shields.io/badge/python-3.12+-blue.svg)](https://www.python.org/downloads/)
-[![PyPI version](https://img.shields.io/pypi/v/agent-control-sdk.svg)](https://pypi.org/project/agent-control-sdk/)
-[![npm version](https://img.shields.io/npm/v/agent-control.svg)](https://www.npmjs.com/package/agent-control)
-[![CI](https://github.com/agentcontrol/agent-control/actions/workflows/ci.yml/badge.svg)](https://github.com/agentcontrol/agent-control/actions/workflows/ci.yml)
-[![codecov](https://codecov.io/gh/agentcontrol/agent-control/branch/main/graph/badge.svg)](https://codecov.io/gh/agentcontrol/agent-control)
+<p align="center">
+  <img
+    src="docs/images/AgentControl-logo-light.png#gh-light-mode-only"
+    alt="Agent Control Logo (light)"
+    width="120"
+  />
+  <img
+    src="docs/images/AgentControl-logo-dark.png#gh-dark-mode-only"
+    alt="Agent Control Logo (dark)"
+    width="120"
+  />
+</p>
+
+<h1 align="center">Agent Control</h1>
+
+<p align="center">
+  <a href="https://opensource.org/licenses/Apache-2.0"><img src="https://img.shields.io/badge/License-Apache_2.0-blue.svg" alt="License" /></a>
+  <a href="https://www.python.org/downloads/"><img src="https://img.shields.io/badge/python-3.12+-blue.svg" alt="Python 3.12+" /></a>
+  <a href="https://pypi.org/project/agent-control-sdk/"><img src="https://img.shields.io/pypi/v/agent-control-sdk.svg" alt="PyPI version" /></a>
+  <a href="https://www.npmjs.com/package/agent-control"><img src="https://img.shields.io/npm/v/agent-control.svg" alt="npm version" /></a>
+  <a href="https://github.com/agentcontrol/agent-control/actions/workflows/ci.yml"><img src="https://github.com/agentcontrol/agent-control/actions/workflows/ci.yml/badge.svg" alt="CI" /></a>
+  <a href="https://codecov.io/gh/agentcontrol/agent-control"><img src="https://codecov.io/gh/agentcontrol/agent-control/branch/main/graph/badge.svg" alt="codecov" /></a>
+</p>
 
 > **💡 Pro Tip:** Checkout [docs](https://docs.agentcontrol.dev/) for complete reference