feat: additional api endpoint (jupiterapi.com)

[zer0cache]

This PR adjusts the API constants provided for the jupiter package. The default API was updated for swap/quote to leverage jupiterapi.com. The API offers higher rate limits along with a faster updated market cache. The jupiterapi.com market cache surfaces newly launched tokens faster since it doesn't require a certain volume/liquidity threshold to be met, along with an improved cadence of it being updated. With that said, the API does take a small platform fee (0.2%) on swaps given the stability/rate limits/new markets it provides. More details can be found on their site.

I also updated the README.md to provide options to other endpoints in case higher rate limits are needed.

[ilkamo]

Hi @zer0cache, thanks for the contribution.

I have concerns about changing the DefaultAPIURL to one that includes a platform fee. While the fee is small, it's crucial that developers are fully aware of this change and make the decision to use the new API endpoint consciously. If we were to change the DefaultAPIURL, there's a risk that developers might inadvertently update the library and start using the new API, thereby incurring fees unknowingly. I want to ensure that we avoid this scenario.

Therefore, I propose that we keep the current DefaultAPIURL as is. We can include the new API endpoint as a second option and clearly document its benefits and the associated platform fee in the README.md. This way, developers can make a conscious decision based on their specific needs.

I'm open to merging this PR with the above modification. Looking forward to your thoughts on this.

[zer0cache]

Hi @ilkamo!

This is great feedback and thank you for taking the time out to review. Those are valid points and I forgot to consider about the inadvertently updating the library and the URL changing on folks. I'll make the proposed update of keeping DefaultAPIURL the same along with the second option with the associated information on the README.md.

Thank you for the feedback and love the library!