Add quickstart section to README

Author: Vijaya Lakshmi Pokala

README.md

@@ -0,0 +1,16 @@
+## Quickstart
+
+This section helps you install and run **sbmlsim** locally.
+
+### 1. Requirements
+- Python ≥ 3.10
+- pip
+- Git
+
+### 2. Installation
+Clone the repository and install in editable mode:
+
+```bash
+git clone https://github.com/matthiaskoenig/sbmlsim.git
+cd sbmlsim
+pip install -e .