patterns: Add .ras pattern (#216)

* Add simple .ras file pattern

* Update ras.hexpat

* Update README.md

* Add .ras test file

* Update ras.hexpat

* Update ras.hexpat

* Update ras.hexpat

* Update ras.hexpat

README.md

@@ -94,6 +94,7 @@ Everything will immediately show up in ImHex's Content Store and gets bundled wi
 | PYC | | [`patterns/pyc.hexpat`](patterns/pyc.hexpat) | Python bytecode files |
 | QBCL | | [`patterns/qbcl.hexpat`](patterns/qbcl.hexpat) | Qubicle voxel scene project file |
 | QOI  | `image/qoi` | [`patterns/qoi.hexpat`](patterns/qoi.hexpat) | QOI image files |
+| RAS  | `image/x-sun-raster` | [`patterns/ras.hexpat`](patterns/ras.hexpat) | RAS image files |
 | Shell Link | `application/x-ms-shortcut` | [`patterns/lnk.hexpat`](patterns/lnk.hexpat) | Windows Shell Link file format |
 | shp | | [`patterns/shp.hexpat`](patterns/shp.hexpat) | ESRI shape file |
 | shx | | [`patterns/shx.hexpat`](patterns/shx.hexpat) | ESRI index file |

patterns/ras.hexpat

@@ -0,0 +1,31 @@
+#pragma author Fl3ch4
+
+#pragma MIME image/webp
+#pragma endian big
+
+
+#include <std/mem.pat>
+#include <type/magic.pat>
+
+
+struct RAS{
+
+  //Magic Bytes
+  type::Magic<"\x59\xa6\x6a\x95"> signature;
+ 
+  //BE -> px -> mm
+  u32 width [[name("Width")]];
+  u32 height [[name("Height")]];
+  
+  //BE
+  u32 depth;
+  u32 length;
+  u32 type;
+  u32 colorMapType;
+  u32 colorMapLenght;
+  
+  //Data Viewer
+  u8 image_data[length]; 
+};
+
+RAS header @0x00;