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

nim/test_pi.py

@@ -0,0 +1,47 @@
+import unittest
+import subprocess
+import sys
+
+SCRIPT_PATH = "/Users/einand/Code/test/nim/print_hej"
+
+def run_script(decimals=None):
+    cmd = [SCRIPT_PATH]
+    if decimals is not None:
+        cmd.append(str(decimals))
+    result = subprocess.run(cmd, capture_output=True, text=True)
+    return result.stdout.strip()
+
+class TestPi(unittest.TestCase):
+    def test_10_decimals(self):
+        result = run_script(10)
+        expected = "3.1415926535"
+        self.assertEqual(result, expected)
+    
+    def test_5_decimals(self):
+        result = run_script(5)
+        expected = "3.14159"
+        self.assertEqual(result, expected)
+    
+    def test_1_decimal(self):
+        result = run_script(1)
+        expected = "3.1"
+        self.assertEqual(result, expected)
+    
+    def test_100_decimals(self):
+        result = run_script(100)
+        expected = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"
+        self.assertEqual(result, expected)
+    
+    def test_default_100_decimals(self):
+        result = run_script()
+        expected = "3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679"
+        self.assertEqual(result, expected)
+    
+    def test_10000_decimals(self):
+        result = run_script(10000)
+        # Check length: "3." + 10000 digits = 10002 characters
+        self.assertEqual(len(result), 10002)
+        self.assertTrue(result.startswith("3.14159"))
+
+if __name__ == "__main__":
+    unittest.main()