KCL parser: Allow .prop or [index] to follow any expression (#7371)

Previously in a member expression like `foo.x` or `foo[3]`, `foo` had to be an identifier. You could not do something like `f().x` (and if you tried, you got a cryptic error). Rather than make the error better, we should just accept any expression to be the LHS of a member expression (aka its 'object').

This does knock our "parse lots of function calls" from 58 to 55 calls before it stack overflows. But I think it's fine, we'll address this in https://github.com/KittyCAD/modeling-app/pull/6226 when I get back to it.

Closes https://github.com/KittyCAD/modeling-app/issues/7273

rust/kcl-lib/src/lsp/kcl/hover.rs

@@ -247,17 +247,6 @@ impl ObjectProperty {
     }
 }
 
-impl MemberObject {
-    fn get_hover_value_for_position(&self, pos: usize, code: &str, opts: &HoverOpts) -> Option<Hover> {
-        match self {
-            MemberObject::MemberExpression(member_expression) => {
-                member_expression.get_hover_value_for_position(pos, code, opts)
-            }
-            MemberObject::Identifier(_identifier) => None,
-        }
-    }
-}
-
 impl MemberExpression {
     fn get_hover_value_for_position(&self, pos: usize, code: &str, opts: &HoverOpts) -> Option<Hover> {
         let object_source_range: SourceRange = self.object.clone().into();