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

fortran/cmd/build.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Fortran Build Script
+
+SCRIPT_DIR="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$SCRIPT_DIR"
+
+echo "=== Fortran Build ==="
+echo ""
+
+# Check for gfortran
+if command -v gfortran &> /dev/null; then
+    FC=gfortran
+elif command -v f95 &> /dev/null; then
+    FC=f95
+elif command -v f90 &> /dev/null; then
+    FC=f90
+else
+    echo "✗ Ingen Fortran-kompilator hittades!"
+    echo "  Installera gfortran: brew install gcc"
+    exit 1
+fi
+
+echo "Använder: $FC"
+
+# Compile
+if $FC -O2 -o bin/print_hej src/print_hej.f90 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