fix: strip java client

[millotp]

🧭 What and Why

Strip the java client to remove all unused code and useless functionality.
I think a lot of code can still be removed, but this is already a big PR.

Changes included:

• Removed unused mustache files
• Remove swagger related stuff in the java code
• Remove some duplicate doc (like the response for each endpoint)
• Remove unused library (joda, threeten, bean)
• Remove cookies
• Remove ssl certificates
• Remove file download
• Rename local variables
• Simplify api calls

🧪 Test

yarn docker playground:java

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I already like what I'm seeing here

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PR is pretty big but easy to review, it's good to go on my side! GG :D

I'd ask a small overview from @aallam on some random files, just to see if he have any comments on the shape of the current client

[millotp]

I'd ask a small overview from @aallam on some random files, just to see if he have any comments on the shape of the current client

I think it's still early, I haven't changed the http client or anything yet, just simplifying