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/components/header_start.hpp

@@ -0,0 +1,32 @@
+#pragma once
+
+/*
+	gencpp: An attempt at "simple" staged metaprogramming for c/c++.
+
+	See Readme.md for more information from the project repository.
+
+	Public Address:
+	https://github.com/Ed94/gencpp  --------------------------------------------------------------.
+	|   _____                               _____ _                       _                        |
+	|  / ____)                             / ____} |                     | |                       |
+	| | / ___  ___ _ __   ___ _ __  _ __  | {___ | |__ _ _, __ _, ___  __| |                       |
+	| | |{_  |/ _ \ '_ \ / __} '_ l| '_ l `\___ \| __/ _` |/ _` |/ _ \/ _` |                       |
+	| | l__j | ___/ | | | {__; |+l } |+l | ____) | l| (_| | {_| | ___/ (_| |                       |
+	|  \_____|\___}_l |_|\___} ,__/| ,__/ (_____/ \__\__/_|\__, |\___}\__,_l                       |
+	|                        | |   | |                      __} |                                  |
+	|                        l_l   l_l                     {___/                                   |
+	! ----------------------------------------------------------------------- VERSION: v0.25-Alpha |
+	! ============================================================================================ |
+	! WARNING: THIS IS AN ALPHA VERSION OF THE LIBRARY, USE AT YOUR OWN DISCRETION                 |
+	! NEVER DO CODE GENERATION WITHOUT AT LEAST HAVING CONTENT IN A CODEBASE UNDER VERSION CONTROL |
+	! ============================================================================================ /
+*/
+#if ! defined(GEN_DONT_ENFORCE_GEN_TIME_GUARD) && ! defined(GEN_TIME)
+#	error Gen.hpp : GEN_TIME not defined
+#endif
+
+//! If its desired to roll your own dependencies, define GEN_ROLL_OWN_DEPENDENCIES before including this file.
+// Dependencies are derived from the c-zpl library: https://github.com/zpl-c/zpl
+#ifndef GEN_ROLL_OWN_DEPENDENCIES
+#	include "gen.dep.hpp"
+#endif