WarpEngine 0.8.0

What a host gets by moving up from 0.7:

- `WarpEngine::Platform` — the platform registry. `PlatformLink::SUPPORTED_PLATFORMS`
  keeps working as an alias.
- `WarpEngine::ApiErrorRendering` — the engine's JSON error bodies, includable
  by the host's own API controllers.
- `WarpEngine::Storage.mime_for` and `ReleaseAsset.for_relative_path`.
- `c.site_url` — where the catalog's public site lives, for the admin's link to
  a title's page. nil by default, and the link is simply left out.
- `Software` now validates `platform` and `status` against their value sets. A
  host writing a status outside development/demo/released/archived with
  `update!` will start hearing about it — which is the point — and one writing
  it with `update_columns` still will not.
- Ordering left `PlatformLink`'s and `SoftwareImage`'s `default_scope` for an
  `ordered` scope. The API's output order is unchanged; code that relied on the
  implicit order of a bare `PlatformLink.all` has to ask for it.
- The generated `Image` model writes its file `after_commit` instead of
  `before_save`, and gained `#url`.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

lib/warp_engine/version.rb

@@ -1,5 +1,5 @@
 module WarpEngine
-  VERSION = "0.7.0"
+  VERSION = "0.8.0"
 
   VERSION_HEADER = "WarpEngine-Version".freeze
 end