fix: sveltekit server endpoint buffer response

[m3tasploit]

Fix for corrupt images when responding with image/jpeg or any binary data from sveltekit Api endpoint

[jamesdaniels]

@m3tasploit LGTM. Q, does the text content-type repsonse work ok if you always respond with a buffer? Best to avoid conditionals when possible

[m3tasploit]

Oh, sorry i forgot that case, I'll try different content types and update code if necessary

[m3tasploit]

@m3tasploit LGTM. Q, does the text content-type repsonse work ok if you always respond with a buffer? Best to avoid conditionals when possible

I've added check for commonly used text content-types. I'm not sure if this is the correct way to go.