Add TinySpec extension to community catalog

[Quratulain-bilal]

Summary - Adds TinySpec extension to the community catalog and README - 3 commands: /speckit.tinyspec, /speckit.tinyspec.implement, /speckit.tinyspec.classify - 1 hook: before_specify — auto-classify task complexity before starting full SDD - Addresses community request in issue #1174 (22+ reactions) ## What it does Lightweight single-file workflow for small tasks that don't need the full 4-step SDD process:

Full SDD	TinySpec
4 commands, 3+ files, 100+ lines	2 commands, 1 file, <80 lines
specify → plan → tasks → implement	tinyspec → implement

Command	Purpose
/speckit.tinyspec	Generate single-file spec with context, plan, and tasks
/speckit.tinyspec.implement	Implement directly from the tinyspec file
/speckit.tinyspec.classify	Route tasks to tinyspec or full SDD based on complexity

The classifier recommends the right workflow:

• Small (1-5 files, 1-8 tasks) → TinySpec
• Medium/Large (5+ files, 8+ tasks) → Full SDD

Changes

• extensions/catalog.community.json — added tinyspec entry (alphabetical, between sync and
  v-model)
• README.md — added extension row (alphabetical, between Superpowers Bridge and V-Model Extension
  Pack)
• Bumped top-level updated_at to 2026-04-10

Extension repo

https://github.com/Quratulain-bilal/spec-kit-tinyspec