Parser

Milestone 1!

What's Changed

• Implement class and interface by @1-Harshit in #1
• Tree fixes by @1-Harshit in #4
• Add Block by @1-Harshit in #3
• Withfloat by @1-Harshit in #5

New Contributors

• @1-Harshit made their first contribution in #1

Full Changelog: https://github.com/attack-on-compilers/studious-java/commits/parser