fix: restore docs deleted in v0.2.3 release, add Paperclip branding

- Restored docs/ directory that was accidentally deleted by `git add -A`
  in the v0.2.3 release script
- Replaced generic "P" favicon with actual paperclip icon using brand
  primary color (#2563EB)
- Added light/dark logo SVGs for Mintlify navbar (paperclip icon + wordmark)
- Updated docs.json with logo configuration for dark/light mode
- Fixed release.sh to stage only release-related files instead of `git add -A`
  to prevent sweeping unrelated changes into release commits

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/deploy/storage.md

@@ -0,0 +1,39 @@
+---
+title: Storage
+summary: Local disk vs S3-compatible storage
+---
+
+Paperclip stores uploaded files (issue attachments, images) using a configurable storage provider.
+
+## Local Disk (Default)
+
+Files are stored at:
+
+```
+~/.paperclip/instances/default/data/storage
+```
+
+No configuration required. Suitable for local development and single-machine deployments.
+
+## S3-Compatible Storage
+
+For production or multi-node deployments, use S3-compatible object storage (AWS S3, MinIO, Cloudflare R2, etc.).
+
+Configure via CLI:
+
+```sh
+pnpm paperclipai configure --section storage
+```
+
+## Configuration
+
+| Provider | Best For |
+|----------|----------|
+| `local_disk` | Local development, single-machine deployments |
+| `s3` | Production, multi-node, cloud deployments |
+
+Storage configuration is stored in the instance config file:
+
+```
+~/.paperclip/instances/default/config.json
+```