feat: add initial C++ project structure with CMake build and spam word parser

Implement the first version of the borded spam parser as a C++26 project. The commit introduces a complete project skeleton including a `.gitignore` file for CMake and IDE artifacts, a `CMakeLists.txt` with strict warning flags and MSVC compatibility, and the core `src/main.cpp` containing the spam detection logic. The parser reads text files, tokenizes words, counts sentences and capitalized words, and flags occurrences from a predefined list of 35 forbidden spam-related terms (e.g., "crypto", "bitcoin", "recovery", "hack"). Results are aggregated via an `AnalysisResult` struct with a custom `operator+` for combining multiple file analyses.

borded_cpp/.gitignore

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+*.d
+*.slo
+*.lo
+*.o
+*.obj
+*.gch
+*.pch
+*.so
+*.dylib
+*.dll
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+*.lai
+*.la
+*.a
+*.lib
+*.exe
+*.out
+*.app
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+cmake-build-*/
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+*.iws
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+fabric.properties
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+*~
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+CMakeLists.txt.user
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+CMakeFiles
+CMakeScripts
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+CTestTestfile.cmake
+_deps
+CMakeUserPresets.json
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+*.stackdump
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+$RECYCLE.BIN/
+*.cab
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