Rename ASDF systems/packages to io.github.cl-sdk.openapi

[Copilot]

This updates the project’s system and package naming to the fully-qualified io.github.cl-sdk.openapi namespace, including the test system. It also aligns ASDF filenames and docs with the new names.

• System and ASDF rename

  • Renamed primary system: :cl-openapi → :io.github.cl-sdk.openapi
  • Renamed test system: :cl-openapi.test → :io.github.cl-sdk.openapi.test
  • Renamed ASDF files:
    • cl-openapi.asd → io.github.cl-sdk.openapi.asd
    • cl-openapi.test.asd → io.github.cl-sdk.openapi.test.asd

• Package namespace migration

  • Updated package definitions and in-package forms to io.github.cl-sdk.openapi / io.github.cl-sdk.openapi.test
  • Updated all source/test symbol references from cl-openapi:* to io.github.cl-sdk.openapi:*

• Tooling and documentation alignment

  • Updated test runner quickload target to :io.github.cl-sdk.openapi.test
  • Updated README usage/examples to the new namespace and quickload form

;; before
(ql:quickload :cl-openapi)
(cl-openapi:parse json)

;; after
(ql:quickload :io.github.cl-sdk.openapi)
(io.github.cl-sdk.openapi:parse json)