feat: rebrand Hemmelig to paste.es for cloudhost.es

- Set Spanish as default language with ephemeral/encrypted privacy focus
- Translate all user-facing strings and legal pages to Spanish
- Replace Norwegian flag with Spanish flag in footer
- Remove Hemmelig/terces.cloud links, add cloudhost.es sponsorship
- Rewrite PrivacyPage: zero data collection, ephemeral design emphasis
- Rewrite TermsPage: Spanish law, RGPD, paste.es/CloudHost.es references
- Update PWA manifest, HTML meta tags, package.json branding
- Rename webhook headers to X-Paste-Event / X-Paste-Signature
- Update API docs title and contact to paste.es / cloudhost.es

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

prisma/migrations/20250623063739_change_fields/migration.sql

@@ -0,0 +1,26 @@
+/*
+  Warnings:
+
+  - The primary key for the `secrets` table will be changed. If it partially fails, the table could be left without primary key constraint.
+  - You are about to drop the column `is_public` on the `secrets` table. All the data in the column will be lost.
+
+*/
+-- RedefineTables
+PRAGMA defer_foreign_keys=ON;
+PRAGMA foreign_keys=OFF;
+CREATE TABLE "new_secrets" (
+    "id" TEXT NOT NULL PRIMARY KEY,
+    "secret" TEXT NOT NULL,
+    "title" TEXT,
+    "views" INTEGER DEFAULT 1,
+    "password" TEXT,
+    "is_burnable" BOOLEAN DEFAULT false,
+    "created_at" DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "expires_at" DATETIME,
+    "ip_range" TEXT DEFAULT ''
+);
+INSERT INTO "new_secrets" ("created_at", "expires_at", "id", "ip_range", "is_burnable", "password", "secret", "title", "views") SELECT "created_at", "expires_at", "id", "ip_range", "is_burnable", "password", "secret", "title", "views" FROM "secrets";
+DROP TABLE "secrets";
+ALTER TABLE "new_secrets" RENAME TO "secrets";
+PRAGMA foreign_keys=ON;
+PRAGMA defer_foreign_keys=OFF;