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/lex_parser/include/lex_parser.h

@@ -11,7 +11,8 @@ static inline cbool scc_lex_parse_is_whitespace(int ch) {
     return ch == ' ' || ch == '\t';
 }
 
-static inline cbool scc_lex_parse_is_identifier_header(int ch) {
+// TODO identifier check is right?
+static inline cbool scc_lex_parse_is_identifier_prefix(int ch) {
     return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || ch == '_';
 }