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

.gitignore

@@ -0,0 +1,99 @@
+# Build artifacts
+bin/
+*.o
+*.out
+*.exe
+*.app
+*.dSYM/
+
+# Compiled files
+*.class
+*.jar
+*.beam
+*.pyc
+*.pyo
+__pycache__/
+
+# Dependencies
+node_modules/
+target/
+vendor/
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Temporary files
+*.tmp
+*.temp
+*.log
+
+# Language specific
+# C/C++
+*.d
+*.hi
+
+# D
+*.o
+
+# Erlang
+erl_crash.dump
+
+# Go
+*.test
+
+# Haskell
+*.hi
+
+# Java
+*.class
+
+# Julia
+*.jl.cach
+*.jl.mem
+
+# Kotlin
+*.class
+
+# Lua
+*.luac
+
+# Nim
+nimcache/
+
+# Odin
+*.o
+
+# Rust
+target/
+
+# Swift
+.build/
+Package.resolved
+
+# TypeScript
+*.js
+*.js.map
+*.d.ts
+
+# Wolfram
+*.wls
+
+# Vim
+*.swp
+*.swo
+
+# Test results
+test_results/
+*.test
+
+# Profiling
+*.prof
+*.profdata