Generate wolfram.clj with vars for Wolfram symbols

[holyjak]

• Introduce wolframite.impl.wolfram-syms.* for dealing with interning wolfram symbols, move intern and load-syms there
• Add ...write ns to write wolframite/wolfram.clj with defs of the loaded symbols (to be included in git and used as a starting point by users, unless they decide to re-write it)

Fixes #33, #45, #53

[holyjak]

TODO

• Update the docs, mention how to re-create the w ns
• mention wolfram-version, write-ns!, to 'resolve as fn' for w/fn, ...
• Log warning of user has newer Wolfram
• Verify write-ns! works when used in a project that has Wolframite as its library
• kondo config for w/fn

[light-matters]

Thoughts on kernel-info!

As far as I can see it's not side-affecting and so shouldn't have an exclamation mark?
Since it's just returning data on the system then it goes well with similar functions in runtime.system (rather than in core)?

[light-matters]

• Working through the getting started seems to work.
• Docstrings appear in emacs minibuffer while typing out functions (w/N w/PI) etc.
• 'normal' autocompletion didn't seem to work, but after some delay (I was on the phone for five minutes) it seems to work well.

[light-matters]

I really like that I can now do things like

 (-> 'x
    (w/Integrate 'x)
    wl/eval)

i.e. don't have to deal with macros and symbols not playing well with functions.