patterns/includes: Update standard library and patterns to support the new bitfields (#102)

* Add `current_bit_offset()` and `read_bits(...)` to `std::mem`

* Replace deprecated BitfieldOrder enum values with new clearer names

This adds new options named `MostToLeastSignificant` and `LeastToMostSignificant` to replace the old `LeftToRight` and `RightToLeft` names. These names should be much clearer about what they affect and how.

* Throw errors when `std::core::(get|set)_bitfield_order()` are called

* Update all patterns to work with the new bitfield behaviors

includes/std/mem.pat

@@ -113,6 +113,27 @@ namespace std::mem {
     };
 
 
+    /**
+        Gets the current bit offset within the current byte that a bitfield will read.
+    */
+    fn current_bit_offset() {
+        return builtin::std::mem::current_bit_offset();
+    };
+
+    /**
+        Reads a number of bits from the specified bit offset within the specified byte
+        @param byteOffset The byte offset within the data
+        @param bitOffset The bit offset to start the read at within the current byte
+        @param bitSize The total number of bits to read
+        @return A u128 containing the value read
+    */
+    fn read_bits(u128 byteOffset, u128 bitOffset, u64 bitSize) {
+        byteOffset += bitOffset >> 3;
+        bitOffset = bitOffset & 0x7;
+        return builtin::std::mem::read_bits(byteOffset, bitOffset, bitSize);
+    };
+
+
     /**
         Creates a new custom section with the given name
         @param name The name of the section