test(gencpp): add full gencpp/base samples and comprehensive test suite

- Copied 58 files from C:\projects\gencpp\base\ to tests/assets/gencpp_samples
- Added test_gencpp_full_suite.py that validates:
  - Skeleton generation for all .hpp files
  - Code outline generation
  - get_definition for key symbols
  - AST masking with aggregation
- All 25 tests pass

tests/assets/gencpp_samples/dependencies/printing.hpp

@@ -0,0 +1,29 @@
+#ifdef INTELLISENSE_DIRECTIVES
+#	pragma once
+#	include "string_ops.hpp"
+#endif
+
+#pragma region Printing
+
+typedef struct FileInfo FileInfo;
+
+#ifndef GEN_PRINTF_MAXLEN
+#	define GEN_PRINTF_MAXLEN kilobytes(128)
+#endif
+typedef char PrintF_Buffer[GEN_PRINTF_MAXLEN];
+
+// NOTE: A locally persisting buffer is used internally
+GEN_API char*  c_str_fmt_buf       ( char const* fmt, ... );
+GEN_API char*  c_str_fmt_buf_va    ( char const* fmt, va_list va );
+GEN_API ssize  c_str_fmt           ( char* str, ssize n, char const* fmt, ... );
+GEN_API ssize  c_str_fmt_va        ( char* str, ssize n, char const* fmt, va_list va );
+GEN_API ssize  c_str_fmt_out_va    ( char const* fmt, va_list va );
+GEN_API ssize  c_str_fmt_out_err   ( char const* fmt, ... );
+GEN_API ssize  c_str_fmt_out_err_va( char const* fmt, va_list va );
+GEN_API ssize  c_str_fmt_file      ( FileInfo* f, char const* fmt, ... );
+GEN_API ssize  c_str_fmt_file_va   ( FileInfo* f, char const* fmt, va_list va );
+
+constexpr
+char const* Msg_Invalid_Value = "INVALID VALUE PROVIDED";
+
+#pragma endregion Printing