patterns: Added Minecraft LCE ARC file format (#307)

* Create arc.hexpat

* add test file

* mention arc

* abide by contributing.md

* use virtual filesystem

* brainfart

* ifdefs to fix github actions moment #2

README.md

@@ -29,6 +29,7 @@ Everything will immediately show up in ImHex's Content Store and gets bundled wi
 | AFE2 | | [`patterns/afe2.hexpat`](patterns/afe2.hexpat) | Nintendo Switch Atmosphère CFW Fatal Error log |
 | ANI | `application/x-navi-animation` | [`patterns/ani.hexpat`](patterns/ani.hexpat) | Windows Animated Cursor file |
 | AR | `application/x-archive` | [`patterns/ar.hexpat`](patterns/ar.hexpat) | Static library archive files |
+| ARC | | [`patterns/arc.hexpat`(patterns/arc.hexpat) | Minecraft Legacy Console Edition ARC files |
 | ARIA2 | | [`patterns/aria2.hexpat`](patterns/aria2.hexpat) | ARIA2 Download Manager Control files |
 | ARM VTOR | | [`patterns/arm_cm_vtor.hexpat`](patterns/arm_cm_vtor.hexpat) | ARM Cortex M Vector Table Layout |
 | Bastion | | [`patterns/bastion/*`](https://gitlab.com/EvelynTSMG/imhex-bastion-pats) | Various [Bastion](https://en.wikipedia.org/wiki/Bastion_(video_game)) files |

patterns/arc.hexpat

@@ -0,0 +1,26 @@
+#pragma author DexrnZacAttack
+#pragma description Minecraft LCE ARC File
+#pragma endian big
+
+import std.string;
+#ifdef __IMHEX__
+    import hex.core;
+#endif
+
+struct Table {
+    u16 nameSize;
+    char fileName[nameSize];
+    u32 offset;
+    u32 size;
+    u8 file[size] @ offset;
+    #ifdef __IMHEX__
+        hex::core::add_virtual_file(fileName, file);
+    #endif
+} [[name(std::string::to_string(fileName))]];
+
+struct ARC {
+    u32 count;
+    Table table[count];
+};
+
+ARC arc @ 0x00;