fix(typedoc-plugin-appium): allow commands as properties referencing async methods

Instead of only inspecting `ReflectionKind.Method`, we now examine `ReflectionKind.Property`, which can be of type `ReflectionType` pointing to an async function.  Example:

```js
async function baz() {}

class Foo {
  async bar() {} // ReflectionKind.Method
  baz = baz; // ReflectionKind.Property referencing a function
}
```

Also ensures `static` methods aren't picked up; this could happen if a static method shares the same name with a known command method as defined in the builtin routes.

packages/typedoc-plugin-appium/lib/guards.ts

@@ -260,12 +260,18 @@ export function isExternalDriverDeclarationReflection(
 export function isAsyncMethodDeclarationReflection(
   value: any
 ): value is AsyncMethodDeclarationReflection {
+  if (
+    !isDeclarationReflection(value) ||
+    !value.kindOf(ReflectionKind.Method | ReflectionKind.Property) ||
+    value.flags.isStatic
+  ) {
+    return false;
+  }
+  const signatures =
+    (value.type instanceof ReflectionType ? value.type.declaration.signatures : value.signatures) ??
+    [];
   return Boolean(
-    isDeclarationReflection(value) &&
-      value.kindOf(ReflectionKind.Method) &&
-      value.signatures?.find(
-        (sig) => sig.type instanceof ReferenceType && sig.type.name === 'Promise'
-      )
+    signatures.find((sig) => sig.type instanceof ReferenceType && sig.type.name === 'Promise')
   );
 }