chore: Update README

Author: Mukundan314

README.md

@@ -3,3 +3,35 @@
 [![Documentation Status](https://readthedocs.org/projects/python-codeforces/badge/?version=latest)](https://python-codeforces.readthedocs.io/en/latest/?badge=latest)
 
 Codeforces API wrapper for python
+
+## Installation
+
+#### Using `pip`
+
+```shell
+pip install python-codeforces
+```
+
+#### From source
+
+```shell
+git clone https://github.com/Mukundan314/python-codeforces.git
+cd python-codeforces
+pip install .
+```
+
+#### For Development
+
+```shell
+git clone https://github.com/Mukundan314/python-codeforces.git
+cd python-codeforces
+pip install -e .
+```
+
+## Documentation
+
+Documentation can be found at https://python-codeforces.readthedocs.io/en/latest/
+
+## License
+
+See [LICENSE](LICENSE).