feat(cursor): add crosshair options

Add persistent cursor sizing, pick aperture, color, pointer mode, isometric drafting planes, and SNAPANG-aligned grid behavior.\n\nRefs #413

src/app/commands/mod.rs

@@ -301,6 +301,8 @@ inventory::submit!(crate::command::CommandRegistration {
         "CUI",
         "DSETTINGS",
         "GRID",
+        "ISODRAFT",
+        "ISOPLANE",
         "OSNAP",
         "POLAR",
         "QUICKPROPERTIES",
@@ -448,6 +450,10 @@ inventory::submit!(crate::command::CommandRegistration {
         "MIRRTEXT",
         "ZOOMWHEEL",
         "ZOOMFACTOR",
+        "CURSORSIZE",
+        "PICKBOX",
+        "CURSORTYPE",
+        "SNAPANG",
         "ATTREQ",
         "ATTDIA",
         "DIMASSOC",