feat: Prepare v1.17.0 release notes for feature map commands

[StatPan]

Closes #637

[gemini-code-assist]

Code Review

This pull request updates the release version for several feature map commands from v1.18.0 to v1.17.0 across the changelog, documentation, and command registry. It also adds a detailed entry for v1.17.0 in the changelog. Feedback suggests expanding the changelog to include other features introduced in this version, such as the goal command suite and ticket handoff command, to ensure completeness.

[gemini-code-assist]

The release notes for v1.17.0 appear to be incomplete. Based on the command registry in internal/gira/command_registry.go, several other features are also marked as introduced or stabilized in v1.17.0, including the goal command suite and the ticket handoff command. These should be included in the changelog to provide a comprehensive overview of the release.

Suggested change

	- Added optional issue-backed feature map commands with the short `gira feat`
	alias so operators and agents can list feature records, check feature map
	health, and inspect whether a work issue is linked to a capability.
	- Added the feature map convention docs for GitHub issue-backed capability
	records, keeping GitHub Projects as visibility views and GitHub issues as the
	canonical source of truth.
	- Added stable JSON contracts for `feature-map-list/v1`,
	`feature-map-check/v1`, and `feature-map-for/v1`.
	- Added optional issue-backed feature map commands with the short `gira feat`\n alias so operators and agents can list feature records, check feature map\n health, and inspect whether a work issue is linked to a capability.\n- Added the feature map convention docs for GitHub issue-backed capability\n records, keeping GitHub Projects as visibility views and GitHub issues as the\n canonical source of truth.\n- Added stable JSON contracts for `feature-map-list/v1`,\n `feature-map-check/v1`, and `feature-map-for/v1`.\n- Added the goal-level operating model commands (`goal status`, `goal plan`,\n `goal next`, and `goal finish`) with stable JSON contracts for managing\n complex work graphs.\n- Added `gira ticket handoff` with the `worker-handoff/v1` JSON contract to\n compile worker-neutral handoff packets for stateless agents.