changed project structure

Also made functions return result to know how the read went
Also made the file derserializer work more efficiently

examples/test.cpp

@@ -0,0 +1,18 @@
+#include "../src/file_read.h"
+#include <fcntl.h>
+#include <unistd.h>
+#include <print>
+
+int main()
+{
+    file_reader a("test.txt");
+    buffer t;
+    t.data = nullptr;
+    t.allocated = 0;
+    t.size = 10;
+    auto tup = std::make_tuple(t);
+    auto res = a.read_from_tuple(tup);
+
+    if (res.second == READ_CORRECT)
+        std::println("{}", std::get<0>(tup).data);
+}

examples/test.txt

@@ -0,0 +1 @@
+18267127861827192871jasbajs