Remove releases from git tracking and clean up MD5 checksums

- Remove all release packages from git tracking (kept locally)
- Delete MD5 checksum files, keeping only SHA256
- Update .gitignore to exclude releases/ directory
- Update CLAUDE.md release documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -16,6 +16,15 @@ This is a WooCommerce plugin that adds flexible pricing capabilities to products
 
 This project is proudly **"vibe-coded"** using Claude.AI - the entire codebase was created through AI assistance.
 
+## Temporary Roadmap
+
+**Note for AI Assistants:** Clean this section after the specific features are done or new releases are made. Effective changes are tracked in `CHANGELOG.md`. Do not add completed versions here - document them in the Session History section at the end of this file.
+
+### Version 1.3.0
+
+- Implement `https://src.bundespruefstelle.ch/magdev/wc-licensed-product-client/raw/branch/main/docs/client-implementation.md`. Add the license management to the settings page
+- Split the settings page into sub-tabs, like in the WooCommerce Advanced tab
+
 ## Technical Stack
 
 - **Language:** PHP 7.4+
@@ -379,9 +388,8 @@ zip -r wc-tier-and-package-prices/releases/wc-tier-and-package-prices-X.X.X.zip
 # Return to project directory
 cd wc-tier-and-package-prices
 
-# Generate checksums
+# Generate SHA256 checksum
 cd releases
-md5sum wc-tier-and-package-prices-X.X.X.zip > wc-tier-and-package-prices-X.X.X.zip.md5
 sha256sum wc-tier-and-package-prices-X.X.X.zip > wc-tier-and-package-prices-X.X.X.zip.sha256
 cd ..
 ```
@@ -676,9 +684,10 @@ Based on v1.1.22, v1.2.2, and v1.2.3 release experience, here's the complete wor
 - `composer.json` - Version bump
 - `CHANGELOG.md` - Release notes
 - `CLAUDE.md` - Version and roadmap updates
-- `releases/wc-tier-and-package-prices-X.X.X.zip*` - Package and checksums
 - Feature-specific files (templates, PHP classes, etc.)
 
+**Note:** Release packages (`releases/`) are not tracked in git - they are generated locally for distribution.
+
 ### Release Package Creation - Critical Notes
 
 **IMPORTANT:** The zip command must be run from the **parent directory** to create proper archive structure.