feat(trellis): enhance bundled skills and workflow integration

- Updated bundled skills documentation to clarify the structure and usage across all platforms, ensuring consistency in skill root paths.
- Introduced a new `inject-spec-context.py` hook for path-scoped spec context injection, improving the relevance of injected specs during file interactions.
- Enhanced existing hooks to support workflow resolution, allowing for dynamic selection of workflows based on task context.
- Added a command to manage workflow selections for active tasks, enabling better task management and workflow adherence.
- Updated configuration options for spec injection, including character limits and refresh windows, to optimize performance and usability.

.trellis/scripts/common/workflow_phase.py

@@ -22,11 +22,12 @@ from __future__ import annotations
 
 import re
 
-from .paths import DIR_WORKFLOW, get_repo_root
+from . import workflow_selection
+from .paths import get_repo_root
 
 
 def _workflow_md_path():
-    return get_repo_root() / DIR_WORKFLOW / "workflow.md"
+    return workflow_selection.resolve_workflow_md(get_repo_root())
 
 # Match a line that *is* a platform marker: "[A, B, C]" or "[/A, B, C]"
 _MARKER_RE = re.compile(r"^\[(/?)([A-Za-z][^\[\]]*)\]\s*$")