feat(fiction-assistance): register plugin with full bespoke command set

Snapshot of the fiction-assistance plugin in its original Universalis-
specific form before generalization. Adds the missing plugin.json
manifest (subdirectory command paths explicitly listed), moves the two
stray root-level review files into their proper homes (review-all.md
into the reviewing-fiction skill, review-final.md as a command with
frontmatter), and registers the plugin in the marketplace.

Preserved here so the original card-generation and vault-maintenance
commands remain recoverable when the plugin is reduced to a portable
guidance-and-analysis subset in the next commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

fiction-assistance/commands/generate/update-plotline-cards.md

@@ -0,0 +1,78 @@
+---
+description: Update plotline cards
+allowed-tools: Edit(40 - Generated/**), MultiEdit(40 - Generated/**), Write(40 - Generated/**)
+---
+You are analyzing scenes from a science fiction novel to create plotline/story arc cards.
+
+Scan the files in the `00 - Manuscript/` directory and identify all major story threads and character arcs.
+
+With EACH plotline found:
+
+Update (or create, if needed) the plotline card in `40 - Generated/Plotlines/{plotline_name}.md` for use in Obsidian.
+
+Use wiki-style links (`[[file.md]]` or `[[file.md|display name]]`) when referencing manuscript chapters or other files in `40 - Generated/` such as characters, locations, species, etc.  This applies in the frontmatter and in the Markdown below it.
+
+Extract factual information ONLY from the scenes. Do not invent or infer details not explicitly stated in the text.
+
+ALWAYS update the card to match the current format.
+
+Use the following structure:
+
+```yaml
+---
+type: plotline
+name: [full name]
+aliases: [list, of, plotline, aliases]
+tags: [plotline, generated]
+arc_type: [main/character/mystery/political/relationship/technological]
+status: [active/resolved/suspended/abandoned]
+appearances: [list, of, chapter, filenames]
+characters_involved: [list, of, key, characters]
+related_plotlines: [list, of, connected, storylines]
+created: {{first_date}}
+modified: {{current_date}}
+---
+```
+
+# [full name]
+
+[Very short description of the plotline and its significance in the story]
+
+## Basic Information
+- **Full Name**: [Extract exact plotline name or create descriptive name]
+- **Type**: [Main plot, character arc, mystery, political, relationship, etc.]
+- **Status**: [Active, resolved, suspended, abandoned]
+- **Key Characters**: [Primary characters driving this plotline]
+
+## Plot Summary
+- **Core Conflict**: [The central tension or problem this plotline explores]
+- **Stakes**: [What characters stand to gain or lose]
+- **Goals**: [What characters are trying to achieve]
+- **Obstacles**: [What stands in their way]
+
+## Development & Progress
+- **Beginning**: [How this plotline starts or is introduced]
+- **Major Developments**: [Key turning points and progression]
+- **Current Status**: [Where this plotline stands as of latest chapters]
+- **Foreshadowing**: [Hints or setup for future developments]
+
+## Background
+
+[Background information about this plotline, using only information from the scanned chapters]
+
+## Major Events
+
+[Major events that advance this plotline]
+
+## Character Development
+- **Character Growth**: [How characters change through this plotline]
+- **Relationships**: [How relationships evolve]
+- **Internal Conflicts**: [Personal struggles characters face]
+
+## Connections & Intersections
+- **Related Plotlines**: [How this connects to other story threads]
+- **Crossover Points**: [Where this plotline intersects with others]
+- **Dependencies**: [Other plotlines this depends on or influences]
+
+## Story Context
+[This plotline's role in the overall narrative based on the scenes]