RENAMED: GetFileSize() to GetFileLength()

`GetFileSize()` conflicts with the infamous `windows.h`

src/raylib.h

@@ -1041,7 +1041,7 @@ RLAPI bool SaveFileText(const char *fileName, char *text);        // Save text d
 RLAPI bool FileExists(const char *fileName);                      // Check if file exists
 RLAPI bool DirectoryExists(const char *dirPath);                  // Check if a directory path exists
 RLAPI bool IsFileExtension(const char *fileName, const char *ext); // Check file extension (including point: .png, .wav)
-RLAPI int GetFileSize(const char *fileName);                      // Get file size in bytes
+RLAPI int GetFileLength(const char *fileName);                    // Get file length in bytes (NOTE: GetFileSize() conflicts with windows.h)
 RLAPI const char *GetFileExtension(const char *fileName);         // Get pointer to extension for a filename string (includes dot: '.png')
 RLAPI const char *GetFileName(const char *filePath);              // Get pointer to filename for a path string
 RLAPI const char *GetFileNameWithoutExt(const char *filePath);    // Get filename string without extension (uses static string)

src/rcore.c

@@ -2851,8 +2851,9 @@ bool DirectoryExists(const char *dirPath)
     return result;
 }
 
-// Get file size in bytes
-int GetFileSize(const char *fileName)
+// Get file length in bytes
+// NOTE: GetFileSize() conflicts with windows.h
+int GetFileLength(const char *fileName)
 {
     int size = 0;