add setup and run tests README.md

Author: ZLOI27

README.md

@@ -6,5 +6,16 @@ This program takes two files as arguments, compares them, and outputs the differ
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+### Setup
+```bash
+make install
+```
+
+
+### Run tests
+```bash
+make test
+```
+
 ### Asciinema gendiff of two files
 [![asciicast](https://asciinema.org/a/0naRf02Fr7ymDJ0kPU9AUXnbh.svg)](https://asciinema.org/a/0naRf02Fr7ymDJ0kPU9AUXnbh)