Fix typos

Fixes various documentation/source-comment typos

src/App/FreeCADInit.py

@@ -1012,7 +1012,7 @@ class ExtMod(Mod):
     Module based Mod (aka extension module).
 
     This kind of Mods are loaded using python module system, no direct filesystem or
-    copile/execute hacks are used.
+    compile/execute hacks are used.
 
     extension modules must be defined in namespace freecad.*, i.e. freecad.MyAddon.
     """

src/Mod/CAM/Path/Op/MillFacing.py

@@ -323,7 +323,7 @@ class ObjectMillFacing(PathOp.ObjectOp):
 
         boundary_wire = boundary_wire.makeOffset2D(
             obj.StockExtension.Value, 2
-        )  # offset with interesection joins
+        )  # offset with intersection joins
 
         # Determine milling direction
         milling_direction = "climb" if obj.CutMode == "Climb" else "conventional"