Add SEK to currencies

### What is this about?

As a user, I'd like to see the exchange rates for my tokens in SEK.

I'm willing to submit a PR for this issue, if that's okay :)
- If it would be beneficial for the project, I could add more currencies than SEK aswell, for example whichever cryptocompare support.

### Scenario

_No response_

### Design

_No response_

### Technical Details

I've checked the source code, seems the current method to get exchange rates from `in-api.cryptocompare.com/data/price`

This seems possible using current APIs, as SEK is a valid currency there
```
➜ ~ curl 'https://min-api.cryptocompare.com/data/price?fsym=ETH&tsyms=SEK,USD'
{"SEK":20665.36,"USD":1877.3}
```

### Threat Modeling Framework

_No response_

### Acceptance Criteria

SEK available in list of FIAT currencies

### References

_No response_