rename project from SimpleshopTheme to Berrypod

All modules, configs, paths, and references updated.
836 tests pass, zero warnings.

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

fly.toml

@@ -1,20 +1,20 @@
-# fly.toml app configuration file generated for simpleshop-theme on 2026-02-08T20:51:20Z
+# fly.toml app configuration file generated for berrypod on 2026-02-08T20:51:20Z
 #
 # See https://fly.io/docs/reference/configuration/ for information about how to use this file.
 #
 
-app = 'simpleshop-theme'
+app = 'berrypod'
 primary_region = 'lhr'
 
 [build]
   dockerfile = 'Dockerfile'
 
 [env]
-  DATABASE_PATH = '/data/simpleshop_theme.db'
+  DATABASE_PATH = '/data/berrypod.db'
   PHX_SERVER = 'true'
 
 [[mounts]]
-  source = 'simpleshop_data'
+  source = 'berrypod_data'
   destination = '/data'
 
 [http_service]