Phase 0 - Shared Foundations

Change type: additive (initial extraction)

Added

• Initial extraction of ruby_api_pack_core from the shared architecture
  already converged on by ruby_api_pack_active_campaign,
  ruby_api_pack_cloudways, and ruby_api_pack_wordpress:
  • RubyApiPackCore::Connection::Base, a template-method HTTParty/Oj
    connection wrapper providing api_get/api_post/api_put/api_delete,
    shared URL building, 200..299 status handling, content-type-checked
    JSON parsing, and descriptive error messages. Subclasses implement only
    #auth_headers.
  • RubyApiPackCore::Handlers::ResponseValidator, a generic response-shape
    validator (expected_type: :array/:hash) with Rails-aware error
    logging, matching the validator already used by
    ruby_api_pack_active_campaign and ruby_api_pack_wordpress.
  • RubyApiPackCore::Configurable, a mixin extracted from the
    configure/configuration singleton pattern duplicated across all
    three existing gems.
• Full RSpec coverage (19 examples, 100% line coverage) for the connection
  base class, response validator, and configurable mixin, exercised against
  synthetic dummy subclasses/modules.
• Standard PHCDevworks documentation scaffold: README.md, AGENTS.md,
  CLAUDE.md, CODEX.md, COPILOT.md, JULES.md, CONTRIBUTING.md,
  SECURITY.md, CODE_OF_CONDUCT.md, MIT-LICENSE, ROADMAP.md,
  TODO.md, GitHub issue/PR templates, CI workflows, and .coderabbit.yaml.

Changed

• Bumped httparty to ~> 0.24.0 (from ~> 0.22.0) and rubocop-rake to
  ~> 0.7.0 (from ~> 0.6.0) to track current RubyGems releases.
• Reverted an attempted development bundler bump to ~> 4.0; kept ~> 2.5
  after CI failed to resolve/install the newer major version.
• Raised required_ruby_version to >= 3.3.0 (from >= 3.1.0), matching
  Rails 8's own Ruby floor. httparty and rubocop both carry unbounded
  transitive dependencies (multi_xml, parallel) whose newer majors
  require Ruby >= 3.2 and >= 3.3 respectively; rather than pin those
  transitive deps indefinitely, dropped support for Ruby versions below what
  Rails 8 itself requires. Updated the CI matrix to ['3.3.4', '3.4']
  accordingly.