No test project: tests/e2e goes

Owner decision 2026-10-17, with SocialPub's PrivaPub.Tests. The e2e project leaves the solution, the csproj's
exclusions, Tailwind's sources and .gitignore; comments no longer point at it, and CLAUDE.md's e2e section becomes
Verifying: a publish with the Pasture environment, which SocialPub's tools/pasture/peers/decepub.sh serves as
https://decepub.test. appsettings.Pasture.json stays for that, and the deploy still fails if it ever ships. The cards'
data-* hooks stay in the markup.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitignore

@@ -368,6 +368,3 @@ FodyWeavers.xsd
 .tools/
 wwwroot/css/app.css
 
-# the e2e tests: the published app they serve and the browser state they keep
-tests/e2e/.publish/
-tests/e2e/.state/