Improve the CLI

[vivi]

• probably move to questionary
• ask if want to update embeddings / --refresh-embeddings flag
• support Line breaks #8
• currently, CLI only supports a limited amount of characters for input.

- [ ] questionary-style CLI UI for (1) loading+saving (2) viewing bot memory

[drnic]

I started having a conversation about some code. But when I pasted a chunk of code into the CLI, the cli only took the first line -- which led to a nonsensical conversation. Perhaps could we support toggling between single line + multiline inputs (like chatgpt UI)

[vivi]

@drnic Did you try typing // to enter multi-line mode?

[drnic]

@vivi I hadn't and that's embarrassing :) I've now found https://github.com/cpacker/MemGPT#interactive-cli-commands section of bonus commands :)