v9.60.0

ModelingToolkit v9.60.0

Diff since v9.59.0

Merged pull requests:

• feat: create initialization systems for all problem types (#3253) (@AayushSabharwal)
• fix: fix timeseries_parameter_index for array symbolics (#3284) (@AayushSabharwal)
• build: bump OrdinaryDiffEqDefault compat (#3286) (@AayushSabharwal)
• build: bump minor version (#3289) (@AayushSabharwal)