Prep v1.0.0

Add benefits to README (#140)

I'm tired of the same old Ruby, the same old 3.1 (#143)

Allow labels in tests (#138)

Lock minitest to less than 6 for Rails 8+ (#142)

Add Ruby 4.0 to test matrix (#141)

Expand examples (#132)

Tweak the example given for `context` access

Print oaken-main when reporting loc (#136)

Add `new`/`build` to instantiate records with defaults applied. (#135)

Remove explicit `seed :setup` mentions (#134)

Update Gemfile.lock; seems like we need this (#133)

Require the Rails extensions we're using (#131)

Document & test `proxy` chaining (#130)

Remove reliance on Rails' `Kernel#class_eval` core extension (#129)