refactor(main): move file operation functions to new source (#2124)

src/main.cpp

@@ -758,57 +758,3 @@ main(int argc, char *argv[]) {
 
   return lifetime::desired_exit_code;
 }
-
-/**
- * @brief Read a file to string.
- * @param path The path of the file.
- * @return `std::string` : The contents of the file.
- *
- * EXAMPLES:
- * ```cpp
- * std::string contents = read_file("path/to/file");
- * ```
- */
-std::string
-read_file(const char *path) {
-  if (!std::filesystem::exists(path)) {
-    BOOST_LOG(debug) << "Missing file: " << path;
-    return {};
-  }
-
-  std::ifstream in(path);
-
-  std::string input;
-  std::string base64_cert;
-
-  while (!in.eof()) {
-    std::getline(in, input);
-    base64_cert += input + '\n';
-  }
-
-  return base64_cert;
-}
-
-/**
- * @brief Writes a file.
- * @param path The path of the file.
- * @param contents The contents to write.
- * @return `int` : `0` on success, `-1` on failure.
- *
- * EXAMPLES:
- * ```cpp
- * int write_status = write_file("path/to/file", "file contents");
- * ```
- */
-int
-write_file(const char *path, const std::string_view &contents) {
-  std::ofstream out(path);
-
-  if (!out.is_open()) {
-    return -1;
-  }
-
-  out << contents;
-
-  return 0;
-}