feat: add file create, delete, writeBytes and FileFlags class to IO module

Implement File.create() and File.delete() static methods with async libuv operations, add writeBytes() instance method for writing at offsets, introduce FileFlags constants class mirroring POSIX open() flags, refactor File.open() to accept flag parameters via openWithFlags(), and update documentation and module registration accordingly.

src/cli/modules.c

@@ -11,12 +11,14 @@
 extern void directoryList(WrenVM* vm);
 extern void fileAllocate(WrenVM* vm);
 extern void fileFinalize(void* data);
+extern void fileDelete(WrenVM* vm);
 extern void fileOpen(WrenVM* vm);
 extern void fileSizePath(WrenVM* vm);
 extern void fileClose(WrenVM* vm);
 extern void fileDescriptor(WrenVM* vm);
 extern void fileReadBytes(WrenVM* vm);
 extern void fileSize(WrenVM* vm);
+extern void fileWriteBytes(WrenVM* vm);
 extern void processAllArguments(WrenVM* vm);
 extern void statPath(WrenVM* vm);
 extern void stdinReadStart(WrenVM* vm);
@@ -32,7 +34,7 @@ extern void timerStartTimer(WrenVM* vm);
 // If you add a new method to the longest class below, make sure to bump this.
 // Note that it also includes an extra slot for the sentinel value indicating
 // the end of the list.
-#define MAX_METHODS_PER_CLASS 10
+#define MAX_METHODS_PER_CLASS 11
 
 // The maximum number of foreign classes a single built-in module defines.
 //
@@ -98,12 +100,14 @@ static ModuleRegistry modules[] =
     CLASS(File)
       STATIC_METHOD("<allocate>", fileAllocate)
       FINALIZER(fileFinalize)
-      STATIC_METHOD("open_(_,_)", fileOpen)
+      STATIC_METHOD("delete_(_,_)", fileDelete)
+      STATIC_METHOD("open_(_,_,_)", fileOpen)
       STATIC_METHOD("sizePath_(_,_)", fileSizePath)
       METHOD("close_(_)", fileClose)
       METHOD("descriptor", fileDescriptor)
       METHOD("readBytes_(_,_,_)", fileReadBytes)
       METHOD("size_(_)", fileSize)
+      METHOD("writeBytes_(_,_,_)", fileWriteBytes)
     END_CLASS
     CLASS(Stat)
       STATIC_METHOD("path_(_,_)", statPath)