Roadmap: version HoleReport schema and add LSP hole actions

[zrr1999]

Problem / current limitation

The current hole tooling is useful but still alpha-shaped: spore holes exposes only the currently implemented JSON shape, and the editor/LSP flow does not yet provide stable hole actions, hover summaries, or completion hooks that align with the SEP-0005 direction.

Evidence

• spore-evolution/seps/SEP-0005-hole-driven-development.md describes a richer HoleReport protocol and agent/editor loop than the implementation currently exposes.
• The release truth pass had to caveat hole tooling as unstable / partial rather than fully matching the SEP.

Target behavior

• Define and document a versioned HoleReport schema for the currently supported CLI/LSP surface.
• Add LSP/editor-facing hole actions for at least hover summary and actionable fill/fix metadata.
• Keep unsupported SEP-only ideas explicitly marked as roadmap.

Acceptance tests

• CLI tests cover stable JSON output for representative holes.
• LSP tests cover hover and code-action responses for holes.
• Docs describe the versioned schema and the supported action set.

Release priority

P1 / roadmap after first public release