Added the donna.lib.path(...) workflow directive

[Tiendil]

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[Copilot]

Pull request overview

Adds donna.lib.path(...) as a workflow template directive for rendering normalized project paths, and broadens project path semantics so Donna paths can refer to files, directories, or future locations beyond workflow artifacts.

Changes:

• Introduced the Path directive, library registration, tests, and workflow skill documentation.
• Generalized project path validation/normalization while keeping artifact IDs constrained to .donna.md.
• Updated RFC workflows, specs, README, AGENTS guidance, and release notes to use/document normalized path references.

Reviewed changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
workflows/rfc/request.donna.md	Uses donna.lib.path(...) for RFC spec references.
workflows/rfc/design.donna.md	Uses donna.lib.path(...) for design spec references.
specs/behavior/skill_fixtures.md	Requires workflow skill docs to describe the new path directive.
specs/behavior/file_paths.md	Defines generalized project path and template path directive behavior.
specs/architecture/entities.md	Adds guidance for narrow static typing suppressions.
README.md	Mentions workflow text directives including donna.lib.path(...).
donna/workspaces/tests/test_paths.py	Updates and extends path normalization tests.
donna/workspaces/tests/test_errors.py	Removes tests for the deleted unsupported extension error.
donna/workspaces/tests/test_artifacts.py	Updates artifact discovery expectations for generalized names.
donna/workspaces/paths.py	Adds project path normalization and separates artifact ID validation.
donna/workspaces/errors.py	Removes unsupported artifact extension workspace error.
donna/workspaces/artifacts.py	Removes redundant artifact extension runtime check.
donna/skills/fixtures/workflows.md	Documents donna.lib.path(...) usage and modes.
donna/primitives/directives/tests/test_path.py	Adds tests for path directive argument handling and rendering.
donna/primitives/directives/path.py	Implements the new path directive.
donna/primitives/directives/__init__.py	Exports the new directive primitive.
donna/lib/tests/test_init.py	Verifies donna.lib.path initialization.
donna/lib/__init__.py	Registers the shared path directive instance.
donna/domain/tests/test_paths.py	Adds project path domain validation tests.
donna/domain/tests/test_ids.py	Renames section ID syntax tests and adds Unicode rejection coverage.
donna/domain/tests/test_artifact_ids.py	Updates artifact ID validation coverage for generalized path segments.
donna/domain/paths.py	Adds raw and validated project path primitives.
donna/domain/ids.py	Renames section ID syntax helper.
donna/domain/artifact_ids.py	Bases artifact validation on project paths plus .donna.md.
donna/cli/types.py	Updates artifact CLI parsing around generalized path normalization.
changes/next_release.md	Adds release notes for the directive and path handling changes.
AGENTS.md	Adds guidance for using the polish workflow.

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