feat(lex_parser, pprocessor): rename identifier header check and add macro system

- Rename `scc_lex_parse_is_identifier_header` to `scc_lex_parse_is_identifier_prefix` for clarity and add a TODO comment
- Update lexer to use the renamed function for consistency
- Fix package and dependency names in `cbuild.toml` (`smcc_pprocesser` → `scc_pprocesser`, `smcc_lex_parser` → `lex_parser`)
- Introduce new macro system with header file `pp_macro.h` defining macro types, structures, and management functions
- Refactor preprocessor initialization and cleanup in `pprocessor.c` to use new macro table and stream handling
- Replace legacy `hashmap` with `scc_pp_macro_table_t` for macro storage
- Improve error handling and resource management in preprocessor lifecycle

libs/pprocessor/include/pp_parse.h

@@ -0,0 +1,11 @@
+#ifndef __SCC_PP_PARSE_H__
+#define __SCC_PP_PARSE_H__
+
+#include <libcore.h>
+#include <pp_macro.h>
+void scc_pp_parse_directive(scc_probe_stream_t *stream, scc_pos_t *pos,
+                            scc_macro_table_t *macros);
+cbool scc_pp_expand_macro(scc_probe_stream_t *stream, scc_macro_table_t *macros,
+                          scc_probe_stream_t **out_stream, int depth);
+
+#endif /* __SCC_PP_PARSE_H__ */