v8.66.0

ModelingToolkit v8.66.0

Diff since v8.65.0

Closed issues:

• typos (#2201)
• Namespacing in DDEs doesn't handle delays correctly (#2232)

Merged pull requests:

• Evaluate metadata expr in @mtkmodel (#2242) (@ven-k)
• fix typos (#2243) (@spaette)
• Add support for parameters, equations... for @connectors (#2246) (@ven-k)
• Fix hierarchical modeling with DDEs (#2247) (@ChrisRackauckas)
• Fix systems keyword argument handling in System (#2249) (@YingboMa)