fix: regenerate API docs + fix Ruby CI task for non-rbenv environments

- Regenerate API reference docs to match pub(crate) API surface
- Fix Ruby tasks to work without rbenv (CI uses actions/setup-ruby)

Author: Goldziher

.task/ruby.yml

@@ -24,7 +24,7 @@ tasks:
       - python3 scripts/ci/ruby/vendor-core.py
 
   build:
-    desc: Build Ruby native extension (requires Ruby 3.2-3.4 via rbenv)
+    desc: Build Ruby native extension (requires Ruby 3.2-3.4)
     dir: packages/ruby
     env:
       PROJECT_ROOT: "{{.PROJECT_ROOT}}"
@@ -43,50 +43,38 @@ tasks:
   format:
     desc: Format Ruby code
     dir: packages/ruby
-    env:
-      RBENV_VERSION: "3.4.8"
     cmds:
-      - eval "$(rbenv init - bash)" && bundle exec rubocop -a
+      - '{{ if .RBENV_ROOT }}eval "$(rbenv init - bash)" && {{ end }}bundle exec rubocop -a'
 
   format:check:
     desc: Check Ruby formatting (CI)
     dir: packages/ruby
-    env:
-      RBENV_VERSION: "3.4.8"
     cmds:
-      - eval "$(rbenv init - bash)" && bundle exec rubocop --format simple
+      - '{{ if .RBENV_ROOT }}eval "$(rbenv init - bash)" && {{ end }}bundle exec rubocop --format simple'
 
   lint:
     desc: Lint Ruby code
     dir: packages/ruby
-    env:
-      RBENV_VERSION: "3.4.8"
     cmds:
-      - eval "$(rbenv init - bash)" && bundle exec rubocop
+      - '{{ if .RBENV_ROOT }}eval "$(rbenv init - bash)" && {{ end }}bundle exec rubocop'
 
   lint:check:
     desc: Check Ruby linting without modifications (CI)
     dir: packages/ruby
-    env:
-      RBENV_VERSION: "3.4.8"
     cmds:
-      - eval "$(rbenv init - bash)" && bundle exec rubocop --format simple
+      - '{{ if .RBENV_ROOT }}eval "$(rbenv init - bash)" && {{ end }}bundle exec rubocop --format simple'
 
   typecheck:
     desc: Run Steep type checking
     dir: packages/ruby
-    env:
-      RBENV_VERSION: "3.4.8"
     cmds:
-      - eval "$(rbenv init - bash)" && bundle exec steep check
+      - '{{ if .RBENV_ROOT }}eval "$(rbenv init - bash)" && {{ end }}bundle exec steep check'
 
   rbs-validate:
     desc: Validate RBS type signatures
     dir: packages/ruby
-    env:
-      RBENV_VERSION: "3.4.8"
     cmds:
-      - eval "$(rbenv init - bash)" && bundle exec rbs validate
+      - '{{ if .RBENV_ROOT }}eval "$(rbenv init - bash)" && {{ end }}bundle exec rbs validate'
 
   clean:
     desc: Clean Ruby build artifacts