[FEATURE] ISO-TP (ISO 15765-2) support for CAN

### Is your feature request related to a problem? Please describe.

I'm starting to work on ISO-TP (ISO 15765-2) support for CAN bus in NuttX.

I'd like to check if someone is already working on this and intends to add support for upstream? It's better not to duplicate the work :)

The final goal is to support gdbstub and NSH over the CAN network.

### Describe the solution you'd like

Here some details about protocol: https://en.wikipedia.org/wiki/ISO_15765-2

### Describe alternatives you've considered

_No response_

### Verification

- [x] I have verified before submitting the report.

No files, tests, or entry points are identified. Start by reading the linked ISO 15765-2 overview and clarify the intended NuttX integration for CAN, gdbstub, and NSH. Done should mean agreed upstream support for ISO-TP that enables gdbstub and NSH over the CAN network.

Written by the indexing model from the issue text.