Initial commit: Pi calculation benchmark with 34 languages

- Added implementations for: bash, brainfuck, c, cpp, crystal, csharp, d, dart, elixir, erlang, fortran, go, haskell, java, javascript, julia, kotlin, objective-c, scala, typescript, lua, nim, odin, perl, php, python, r, ruby, rust, swift, zig, assembly, vimscript, wolfram
- All implementations use Machin's formula: π/4 = 4*arctan(1/5) - arctan(1/239)
- Build system with ./build.sh, test system with ./test.sh
- Performance testing with ./run_all.sh
- Comprehensive README.md explaining performance differences
- Test framework verifies correctness against known π values

dart/cmd/build.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# Dart Build Script
+
+SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$SCRIPT_DIR"
+
+echo "=== Dart Build ==="
+echo ""
+
+# Check for dart
+if ! command -v dart &> /dev/null; then
+    echo "✗ Dart-kompilator hittades inte!"
+    echo "  Installera Dart: brew install dart"
+    exit 1
+fi
+
+echo "Använder: dart"
+
+# Compile to native executable
+if dart compile exe src/print_hej.dart -o bin/print_hej 2>&1; then
+    echo "✓ Kompilering lyckades!"
+    echo "  Executable: bin/print_hej"
+    echo ""
+    echo "För att köra:"
+    echo "  ./bin/print_hej <decimaler>"
+else
+    echo "✗ Kompilering misslyckades!"
+    exit 1
+fi