Reorganize Project and Imports #8

- Trims unnecessary parts of the project, including
  - legacy scripts
  - the io module (now covered in `openlifu-sdk`)
  - unused parts of Database (gridweights)
- Reorganizes `virtual_fit` module into `seg`
- Eliminates "eager" imports in `openlifu.__init__`, to prevent the many-seconds-long importing when accessing any submodule.
- Moves importing of heavier-weight packages (which are being made optional by this branch) into the methods that call them, so that the objects can be partially-used without having those dependencies imported.

Code that touches `openlifu.virtual_fit` needs to be refactored to use `openlifu.seg.virtualfit`, and code that used things like `openlifu.Transducer` will need to be changed to use `openlifu.xdc.Transducer`

reorganize virtual fit and geo

remove gridweights

Unused enhancement

Update transducer.py

remove legacy scripts,

Author: peterhollender

docs/hv_controller_api.md

@@ -10,8 +10,8 @@ high-voltage console device over UART using the `LIFUUart` interface.
 ## Initialization
 
 ```python
-from openlifu.io.LIFUHVController import HVController
-from openlifu.io.LIFUUart import LIFUUart
+from openlifu_sdk.io.LIFUHVController import HVController
+from openlifu_sdk.io.LIFUUart import LIFUUart
 
 interface = LIFUInterface(TX_test_mode=False)
 tx_connected, hv_connected = interface.is_device_connected()

docs/tx_device_api.md

@@ -13,8 +13,8 @@ backend.
 ## Initialization
 
 ```python
-from openlifu.io.LIFUTXDevice import TxDevice
-from openlifu.io.LIFUInterface import LIFUInterface
+from openlifu_sdk.io.LIFUTXDevice import TxDevice
+from openlifu_sdk.io.LIFUInterface import LIFUInterface
 
 interface = LIFUInterface(TX_test_mode=False)
 tx_connected, hv_connected = interface.is_device_connected()