d_a_andsw2 OK, d_a_player / d_a_alink cleanup, d_a_alink_hook mostly done (#1957)

* d_a_andsw2 OK

* d_a_player cleanup, d_a_alink cleanup and work on d_a_alink_hook

* remove asm

* d_kankyo_wether almost done

* some work on d_kankyo_rain

include/m_Do/m_Do_mtx.h

@@ -284,6 +284,12 @@ public:
      */
     static void XrotM(s16 x) { mDoMtx_XrotM(now, x); }
 
+    /**
+     * Rotates the `now` matrix on the Z-axis
+     * @param z The rotation value
+     */
+    static void ZrotS(s16 z) { mDoMtx_ZrotS(now, z); }
+
     /**
      * Rotates a new matrix on the z-axis then concatenates it with the `now` matrix
      * @param z The rotation value