Add solution for "Day 8: Playground", part 2

Cargo.lock

@@ -6,6 +6,7 @@ version = 4
 name = "advent_of_code_2025"
 version = "0.1.0"
 dependencies = [
+ "grapherity",
  "grid",
  "memchr",
  "primes",
@@ -23,16 +24,52 @@ dependencies = [
 ]
 
 [[package]]
-name = "grid"
-version = "1.0.0"
+name = "autocfg"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9e2d4c0a8296178d8802098410ca05d86b17a10bb5ab559b3fb404c1f948220"
+checksum = "f2032f911046de80f0a198e0901378627c33f59ea0ac00e363d481118bd70a53"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "grapherity"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98e207bd6e1a0c23dc4a6d87eb51070c58aa7ec3b4ef4522bab9c50a7a7fbdea"
+dependencies = [
+ "typed-generational-arena",
+]
+
+[[package]]
+name = "grid"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b40ca9252762c466af32d0b1002e91e4e1bc5398f77455e55474deb466355ff5"
 
 [[package]]
 name = "memchr"
-version = "2.7.6"
+version = "2.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f52b00d39961fc5b2736ea853c9cc86238e165017a493d1d5c8eac6bdc4cc273"
+checksum = "88904434abc2901f197fe8cc55f0445e7ded921dba5911dad2e2b39b48e663c4"
+
+[[package]]
+name = "nonzero_ext"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db1b4163932b207be6e3a06412aed4d84cca40dc087419f231b3a38cba2ca8e9"
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
 
 [[package]]
 name = "primes"
@@ -42,9 +79,9 @@ checksum = "0466ef49edd4a5a4bc9d62804a34e89366810bd8bfc3ed537101e3d099f245c5"
 
 [[package]]
 name = "regex"
-version = "1.12.2"
+version = "1.12.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "843bc0191f75f3e22651ae5f1e72939ab2f72a4bc30fa80a066bd66edefc24d4"
+checksum = "f1292b7759ae1cb9ec195452d1390a074f0cd8541ab7a5a8c31cd6db45d4a6ba"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -54,9 +91,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.13"
+version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5276caf25ac86c8d810222b3dbb938e512c55c6831a10f3e6ed1c93b84041f1c"
+checksum = "6e1dd4122fc1595e8162618945476892eefca7b88c52820e74af6262213cae8f"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -65,9 +102,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.8.8"
+version = "0.8.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
+checksum = "d6f6ff9a378485b298a5286656da665ba74413d36db0979633275d2e708145d4"
 
 [[package]]
 name = "sanitise-file-name"
@@ -83,3 +120,14 @@ checksum = "0b53b0a5db882a8e2fdaae0a43f7b39e7e9082389e978398bdf223a55b581248"
 dependencies = [
  "regex",
 ]
+
+[[package]]
+name = "typed-generational-arena"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23107afb81ff70f7588dca56c1eeab4dad8b3a141b0e85d2a61fb575d1f12d62"
+dependencies = [
+ "cfg-if",
+ "nonzero_ext",
+ "num-traits",
+]