feat: move source files into retoor_c directory and add build echo messages

- Add echo messages for both build targets to indicate which project is being compiled
- Update isspam.c path to reflect new retoor_c/ subdirectory structure
- Keep binary output location unchanged at project root

retoor_c/rstring_list.h

@@ -0,0 +1,46 @@
+#ifndef RSTRING_LIST_H
+#define RSTRING_LIST_H
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+
+typedef struct rstring_list_t {
+    unsigned long long size;
+    unsigned long long count;
+    char **strings;
+} rstring_list_t;
+
+rstring_list_t *rstring_list_new() {
+    rstring_list_t *rsl = (rstring_list_t *)malloc(sizeof(rstring_list_t));
+    memset(rsl, 0, sizeof(rstring_list_t));
+    return rsl;
+}
+
+void rstring_list_free(rstring_list_t *rsl) {
+    for (unsigned long long i = 0; i < rsl->size; i++) {
+        free(rsl->strings[i]);
+    }
+    if (rsl->strings)
+        free(rsl->strings);
+    free(rsl);
+}
+
+void rstring_list_add(rstring_list_t *rsl, char *str) {
+    if (rsl->count == rsl->size) {
+        rsl->size++;
+        rsl->strings = (char **)realloc(rsl->strings, sizeof(char *) * rsl->size);
+    }
+    rsl->strings[rsl->count] = strdup(str);
+    rsl->count++;
+}
+bool rstring_list_contains(rstring_list_t *rsl, char *str) {
+    for (unsigned long long i = 0; i < rsl->count; i++) {
+        if (!strcmp(rsl->strings[i], str))
+            return true;
+    }
+    return false;
+}
+
+#endif