Alpaca missing: fetchL2OrderBook. missing opt: fetchMyTrades, fetchL2OrderBook, fetchTicker, fetchTickers.

### Is there an existing issue for this?

- [X] I have searched the existing issues

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

We are trying for full support of Alpaca API with CCTX and Freqtrade, we are missing some functions.

Here are the threads...

- https://github.com/ccxt/ccxt/issues/24127
- https://github.com/freqtrade/freqtrade/issues/10862

We are missing: fetchL2OrderBook. missing opt: fetchMyTrades, fetchL2OrderBook, fetchTicker, fetchTickers.

### Describe the solution you'd like.

Can we get some code or guidance on the missing functions.

### Describe an alternate solution.

I cannot think of any other solution, other can to code the functions.

### Anything else? (Additional Context)

_No response_