chore: improve main README

README.md

@@ -1 +1,20 @@
-# aoc-2022
+<h1 align="center">
+  <span>Advent of Code 2022</span>
+  <br>
+  <img width="320" src="https://github.com/giovani-r/aoc-2022/blob/main/calendar.png?raw=true">
+  <br>
+</h1>
+
+<h4 align="center">An advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in <a href="https://github.com/search?q=advent+of+code" target="_blank">any</a> programming language you like.</h4>
+
+## Problems
+
+- [x] Day 1: [Calorie Counting](/day1)
+- [x] Day 2: [Rock Paper Scissors](/day2)
+- [x] Day 3: [Rucksack Reorganization](/day3)
+- [x] Day 4: [Camp Cleanup](/day4)
+- [x] Day 5: [Supply Stacks](/day5)
+- [x] Day 6: [Tuning Trouble](/day6)
+- [x] Day 7: [No Space Left On Device](/day7)
+- [x] Day 8: [Treetop Tree House](/day8)
+- [ ] Day 9: ???