text: Title: Support local path when migrating from wandb to aim
  Body: ## 🚀 Feature
  
  <!-- A clear and concise description of the feature proposal -->
  User can specify the local wandb directory path when migrating from wandb to aim.
  
  ### Motivation
  
  <!-- Please outline the motivation for the proposal. Is your feature request related to a problem? e.g., I'm always frustrated when [...]. If this is related to another GitHub issue, please link here too -->
  When using the command `aim convert wandb --entity 'my_team' --project 'test_project'` to migrate, the server needs to be able to access the network.
  However, since some private servers cannot be connected to the Internet, it cannot be executed at this time. In this case, it would be more flexible to be able to migrate without accessing the network but given a local path.
  
  ### Pitch
  
  <!-- A clear and concise description of what you want to happen. -->
  `aim convert wandb --run $LOCAL_PATH_TO_WANDB_RUN`
  
  ### Alternatives
  
  <!-- A clear and concise description of any alternative solutions or features you've considered, if any. -->
  
  ### Additional context
  
  <!-- Add any other context or screenshots about the feature request here. -->
  