patterns: Added gITF pattern(#205)

* Create gltf.hexpat

Added glTF binary file pattern.

* Add a test file for the glTF pattern.

* Renamed the test file to fit the pattern file name.

* Fixed typo in documentation.

patterns/gltf.hexpat

@@ -0,0 +1,66 @@
+/**
+ * @file <gltf.pat> ImHex Pattern for glTF binary files.
+ * 
+ * Copyright (c) 2023 H. Utku Maden <utkumaden@hotmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <std/mem.pat>
+#include <std/io.pat>
+
+/**
+ * @brief The glTF magic section.
+ */
+struct gltf_magic_t {
+    char magic[4];  /**< The magic value. Must be "glTF" */
+    u32 version;    /**< The version. Must be 2 for glTF 2.0. */
+    u32 length;     /**< Length of the file in bytes, including magic section. */
+};
+
+/**
+ * @brief Enumeration of well defined glTF chunks.
+ */
+enum gltf_chunk_type_t : u32 {
+    JSON = 1313821514 /* "JSON"  */,  /**< JSON chunk. */
+    BIN  = 5130562    /* "BIN\0" */,  /**< Binary data chunk. Could be an image or model data. */
+};
+
+/**
+ * @brief A glTF chunk.
+ */
+struct gltf_chunk_t {
+    u32 length;             /**< Length of this chunk. */
+    gltf_chunk_type_t type [[format("gltf_format")]]; /**< Type of the chunk. JSON or BIN expected. */
+    u8 string[length];      /**< The chunk data. */
+};
+
+fn gltf_format(gltf_chunk_type_t x)
+{
+         if (x == gltf_chunk_type_t::JSON) return "JSON";
+    else if (x == gltf_chunk_type_t::BIN) return "BIN";
+    
+    return "";
+};
+
+gltf_magic_t magic @ 0x00;
+gltf_chunk_t chunks[while(!std::mem::eof())] @ $;
+
+if (magic.magic != "glTF")
+    std::error("This file might not be a glTF file, expected \"glTF\", got %s", magic.magic);