Merge the website into this repo

[Zac-HD]

We've intended since #1224 to eventually merge the website into this repo, and between #2664 and https://github.com/HypothesisWorks/HypothesisWorks.github.io/pull/30 I think we should do so soon. Points to consider:

• [x] Merge the website repo into a /website/ directory in this one, keeping the git history Done in #3333 by @Macavirus 🎉
• [x] Fix any bit-rot in the build system so that builds work nicely
  • https://github.com/HypothesisWorks/hypothesis/compare/master...Zac-HD:website-revival throws out the old Jekyll build entirely to use Pelican (a pure-Python static site generator). Needs a nice theme; otherwise done - including deleting obsolete product and training pages.
  • [ ] delete newsletter signup link https://github.com/HypothesisWorks/HypothesisWorks.github.io/issues/35
  • [ ] delete reference to long-dead Java prototype https://github.com/HypothesisWorks/HypothesisWorks.github.io/issues/36
• [ ] Add a live-preview for pull requests so that we can check changes
• [ ] Point 'production' to the new version (DNS? GitHub Pages config?)
• [ ] Ensure that hypothesis.works and hypothesis.readthedocs.org prominently link to each other
  • [ ] Maybe we should host docs at docs.hypothesis.works?

• [ ] Write more blog posts, e.g. talking about the Ghostwriter or cool case studies

  • [ ] article on the "expected result for explicit examples" trick

    
    unknown_result = object()

  @example(x=1, expected=2) @example(x=2, expected=unknown_result) @given(x=st.integers(), expected=st.just(unknown_result)) def test(x, expected): result = f(x) assert 0 <= x # whatever properties you want if expected is not unknown_result: assert result == expected # if we know the exact output, assert that too!

  
  - [ ] article on ghostwriter argument-guessing (https://github.com/HypothesisWorks/hypothesis/pull/3313); complete with list and link to online demo https://zhd.dev/ghostwriter/
  - [ ] a "big list of properties" as recipes with Hypothesis, similar to [this F# post](https://fsharpforfunandprofit.com/posts/property-based-testing-2/)
  - [ ] update [Hypothesis article about fixtures interaction](https://hypothesis.works/articles/hypothesis-pytest-fixtures/) with respect to [this stackoverflow question](https://stackoverflow.com/questions/72792829/use-pytest-fixtures-in-test-with-hypothesis).

Doesn't need to be in that exact order, but I think those are the main points.

[asmeurer]

I've always found it confusing the hypothesis has two different websites, which don't even point to one another.