Function resolveWithFallbacks

Skills module exports (Voyager-style skill library) - Issue #528 Split from agents.ts for file size compliance (Issue #285)

resolveWithFallbacks(
    graph: ISkillDependencyGraph,
    skillIds: readonly string[],
    available: ReadonlySet<string>,
): Result<readonly string[], DependencyError>
Resolves skill dependencies with fallbacks for missing optional dependencies.
Parameters
- graph: ISkillDependencyGraph
  The dependency graph
- skillIds: readonly string[]
  Skills to resolve
- available: ReadonlySet<string>
  Set of available skill IDs
Returns Result<readonly string[], DependencyError>
Result with resolved skill IDs or error
- Defined in packages/nexus-agents/src/agents/skills/skill-dependency-graph-helpers.ts:193