Add readme

README.md

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-# bahmcloud_store
+# Bahmcloud Store (BCS) for Home Assistant
 
-Bahmcloud Store for installing costum_components to Homeassistant
+Bahmcloud Store (BCS) is a provider-neutral store for Home Assistant custom integrations.
+It allows you to browse, install, update, downgrade, uninstall and restore integrations
+directly from the Home Assistant UI.
+
+This README is intended for **end users**.
+
+---
+
+## Installation
+
+### Option A: Home Assistant OS / Supervised (Add-on – recommended)
+
+1. Open **Settings → Add-ons → Add-on Store**
+2. Add the Bahmcloud Add-on repository
+3. Install **Bahmcloud Store Installer**
+4. Start the add-on
+5. Restart Home Assistant
+
+Installed to:
+/config/custom_components/bahmcloud_store
+
+---
+
+### Option B: Manual Installation (Container / Core)
+
+1. Download the latest release
+2. Copy `custom_components/bahmcloud_store` to:
+   /config/custom_components/bahmcloud_store
+3. Restart Home Assistant
+
+---
+
+## Repository Sources
+
+- **BCS Official**
+- **HACS**
+- **Custom**
+
+---
+
+## Documentation
+
+Developer documentation:
+https://git.bahmcloud.de/bahmcloud/bahmcloud_store/src/branch/main/README_DEVELOPER.md
+
+Full technical documentation:
+https://git.bahmcloud.de/bahmcloud/bahmcloud_store/src/branch/main/README_FULL.md