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

julia/src/print_hej.jl

@@ -0,0 +1,65 @@
+#!/usr/bin/env julia
+
+# Pi calculation using Machin's formula
+# pi/4 = 4*arctan(1/5) - arctan(1/239)
+
+# Calculate pi using Machin's formula
+function calculate_pi(decimals::Int)
+    if decimals < 1
+        decimals = 100
+    end
+    
+    # Set precision (need extra bits for accuracy)
+    setprecision(decimals * 4 + 100)
+    
+    # Machin's formula: pi/4 = 4*arctan(1/5) - arctan(1/239)
+    pi_val = BigFloat(4) * atan(BigFloat(1)/5) - atan(BigFloat(1)/239)
+    pi_val *= 4
+    
+    # Format output
+    pi_str = string(pi_val)
+    
+    # Extract just the digits we need
+    if decimals == 0
+        return "3"
+    else
+        # Find decimal point
+        decimal_pos = findfirst('.', pi_str)
+        if decimal_pos === nothing
+            return pi_str
+        end
+        
+        # Get digits after decimal point
+        after_decimal = pi_str[decimal_pos+1:end]
+        
+        # Pad or truncate to desired length
+        if length(after_decimal) < decimals
+            after_decimal *= repeat("0", decimals - length(after_decimal))
+        else
+            after_decimal = after_decimal[1:decimals]
+        end
+        
+        return "3." * after_decimal
+    end
+end
+
+# Main
+function main()
+    # Get decimals from command line
+    decimals = 100
+    if length(ARGS) > 0
+        try
+            decimals = parse(Int, ARGS[1])
+            if decimals < 1
+                decimals = 100
+            end
+        catch
+            decimals = 100
+        end
+    end
+    
+    result = calculate_pi(decimals)
+    println(result)
+end
+
+main()