Begin setting up stack unwinding/tracing.

This actually worked so I am chuffed, but it doesn't read the necessary
DWARF structures just yet. Still a good step forwards.

Cargo.lock

@@ -99,6 +99,12 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "elf"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4445909572dbd556c457c849c4ca58623d84b27c8fff1e74b0b4227d8b90d17b"
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -111,7 +117,9 @@ version = "0.1.0"
 dependencies = [
  "cc",
  "crossbeam",
+ "elf",
  "futures-util",
+ "gimli",
  "libm",
  "limine",
  "linked_list_allocator",
@@ -145,6 +153,12 @@ dependencies = [
  "pin-utils",
 ]
 
+[[package]]
+name = "gimli"
+version = "0.31.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
+
 [[package]]
 name = "ident_case"
 version = "1.0.1"