Globals must go!

[SuperAuguste]

The title is pretty self-explanatory: global variables/constructs must go!

• [ ] main.zig
  • [ ] actual_log_level
  • [x] stdout, which is actually a BufferedWriter to stdout
  • [x] allocator
  • [x] document_store
  • [x] client_capabilities
  • [x] offset_encoding
• [ ] analysis.zig
  • [ ] using_trail
  • [ ] resolve_trail

Ideas

• We likely need a Server construct similar to our test runner's.

There are probably more globals that need addressing and ideas for addressing them, so leave a comment with any feedback!