feat(lex_parser, pprocessor): replace consume with next and remove stream resets

- Replace `scc_probe_stream_consume` with `scc_probe_stream_next` for consistent stream advancement
- Remove redundant `scc_probe_stream_reset` calls before peeking, as `next` and `peek` handle state
- Update `scc_cstring_new` to `scc_cstring_create` and `scc_pos_init` to `scc_pos_create` for naming consistency
- Change `scc_pp_macro_get` parameter to `const scc_cstring_t*` for better const-correctness
- Improves code clarity and maintains proper stream position tracking

libs/pprocessor/include/pp_macro.h

@@ -8,6 +8,7 @@
 typedef enum {
     SCC_PP_MACRO_OBJECT,   // 对象宏
     SCC_PP_MACRO_FUNCTION, // 函数宏
+    SCC_PP_MACRO_NONE,     // 不是宏
 } scc_pp_macro_type_t;
 
 typedef SCC_VEC(scc_cstring_t) scc_pp_macro_list_t;
@@ -79,7 +80,7 @@ scc_pp_macro_t *scc_pp_macro_table_set(scc_pp_macro_table_t *pp,
  * @return 找到的宏对象指针，未找到返回NULL
  */
 scc_pp_macro_t *scc_pp_macro_table_get(scc_pp_macro_table_t *pp,
-                                       scc_cstring_t *name);
+                                       const scc_cstring_t *name);
 
 /**
  * @brief 从预处理器中删除宏