fix: resolve markdownlint MD003 heading style issues in README.md

- Remove unnecessary horizontal rules (---) that were being interpreted as setext-style headings
- Maintain proper atx-style heading format throughout the document
- Ensure all headings use # symbols instead of underline-style formatting

This resolves the markdownlint MD003/heading-style error that was occurring on line 5.

Author: sdirishguy

README.md

@@ -8,16 +8,13 @@
 [![Tested](https://img.shields.io/badge/Tests-passing-brightgreen)](tests/)
 [![PyPI version](https://badge.fury.io/py/shellrosetta.svg)](https://pypi.org/project/shellrosetta/)
 [![codecov](https://codecov.io/github/sdirishguy/shellrosetta/branch/main/graph/badge.svg?token=6X3X6MK47L)](https://codecov.io/github/sdirishguy/shellrosetta)
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 ## What is ShellRosetta?
 
 ShellRosetta is a cross-platform CLI tool for developers, sysadmins, and anyone switching between Windows and Linux.
 
 It instantly translates commands—including flags and arguments—between Linux/Bash and PowerShell. No more flipping between cheat sheets or Stack Overflow!
 
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 ## Features
 
 - 🖥️ **Interactive Shell Mode!** Open ShellRosetta as a REPL and translate commands live, just like in a real shell.
@@ -34,8 +31,6 @@ It instantly translates commands—including flags and arguments—between Linux
 - 🌐 **Web API:** REST API and beautiful web interface for programmatic access.
 - 📊 **Advanced Features:** AST parsing, configuration management, and comprehensive testing.
 
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 ## What's New in v1.1.0
 
 - ✅ **Fixed all markdownlint formatting issues** in documentation
@@ -44,8 +39,6 @@ It instantly translates commands—including flags and arguments—between Linux
 - ✅ **Resolved import dependencies** (flask-cors installation)
 - ✅ **Better cross-platform support** with readline handling for Windows
 
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 ## Quickstart
 
 **Install from PyPI:**