feat(cms): white-label email templates and API doc config

Replace all hardcoded muellerprints brand identity in email templates
with template variables (shopName, shopContactName, shopAddress,
shopPhone, shopEmail, shopLogoUrl, shopSecondaryLogoUrl) sourced from
env vars SHOP_NAME, SHOP_CONTACT_NAME, SHOP_ADDRESS, SHOP_PHONE,
SHOP_EMAIL, SHOP_LOGO_URL, SHOP_SECONDARY_LOGO_URL.

API documentation title/description now driven by API_TITLE and
API_DESCRIPTION env vars.

Closes #1

CHANGELOG.md

@@ -2,7 +2,26 @@
 
 All notable changes to libreshop/cms are documented here.
 
-## Unreleased
+## [0.1.1] - 2026-04-29
+
+### Changed
+
+- White-label email templates: replace all hardcoded muellerprints company
+  identity (name, contact, address, phone, email, logo URLs) with
+  `<%= shopName %>` / `<%= shopContactName %>` / `<%= shopAddress %>` /
+  `<%= shopPhone %>` / `<%= shopEmail %>` / `<%= shopLogoUrl %>` /
+  `<%= shopSecondaryLogoUrl %>` template variables, sourced from env vars
+  `SHOP_NAME`, `SHOP_CONTACT_NAME`, `SHOP_ADDRESS`, `SHOP_PHONE`,
+  `SHOP_EMAIL`, `SHOP_LOGO_URL`, `SHOP_SECONDARY_LOGO_URL`.
+- `config/constants.ts`: export shop brand constants from env.
+- `src/api/order/services/order.ts`: inject shop context into template calls.
+- `config/plugins.ts`: API doc title/description driven by `API_TITLE` /
+  `API_DESCRIPTION` env vars (defaults: `"Paperwork API"`).
+- `src/extensions/documentation/config/settings.json`: neutral placeholder.
+
+Closes #1
+
+## [0.1.0] - 2026-04-29
 
 - Extracted from `mp/cms/` (2026-04-29). The component history before
   the extraction lives in the `muellerprints` repository.