Add Day 10 and Day 11 solutions

Day 10: Indicator light configuration with bitmask brute-force
Day 11: Graph path counting with memoized DFS
- Part 1: Count all paths from 'you' to 'out'
- Part 2: Count paths from 'svr' to 'out' visiting both 'dac' and 'fft'

data/examples/10.txt

@@ -0,0 +1,5 @@
+[.##.] (3) (1,3) (2) (2,3) (0,2) (0,1) {3,5,4,7}
+[...#.] (0,2,3,4) (2,3) (0,4) (0,1,2) (1,2,3,4) {7,5,12,7,2}
+[.###.#] (0,1,2,3,4) (0,3,4) (0,1,2,4,5) (1,2) {10,11,11,5,10,5}
+
+