feat: added readme

README.md

+## Prerequisites
+
+### Create a `python` virtual environment
+
+```bash
+python3 -m venv .venv
+```
+
+### Activate the virtual environment
+
+```bash
+source .venv/bin/activate
+```
+
+### Installing the dependencies
+
+```bash
+pip3 install -r requirements.txt
+```
+
+## Running the program
+
+```bash
+python3 dct.py ./resources/forest.png
+```
+
+## Example result
+
+![Visual output of the program](./report/figs/example_output.png)