please work on the first commit

.gitignore

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+# OS junk
+.DS_Store
+Thumbs.db
+
+# Editor settings
+.vscode/**
+.idea/**
+*.swp
+*.swo
+
+# Build system metadata (keep actual build dirs tracked)
+CMakeFiles/**
+CMakeCache.txt
+cmake_install.cmake
+Makefile
+compile_commands.json
+
+# Logs and temp files
+*.log
+*.tmp
+*.bak
+*.old
+
+build/**
+*.toml
+.cache/**
+
+
+**/*.aux
+**/*.fdb_latexmk
+**/*.fls
+**/*.log
+**/*.synctex.gz
+**/*.blg
+**/*.bcf
+**/*.run.xml
+**/*.bbl
+
+testcases/*