docs: add module upload release notes

Author: SayanthRock

RELEASE_NOTES.md

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+# Release Notes
+
+## v0.2.0, Module Fix Upload
+
+This release prepares the module for customer testing through GitHub Actions artifact upload.
+
+## Fixed
+
+- Added stronger module validation before ZIP packaging.
+- Added shell syntax checks for module scripts.
+- Added JSON syntax checks for theme and customer option files.
+- Added default theme structure and design tokens.
+- Added UI design system for premium dark customer style.
+- Added lag fix guide and asset size checking.
+- Added customer options catalog.
+- Added default theme download guide.
+- Added problem solver matrix.
+- Added release checklist and device test matrix.
+
+## Build flow
+
+The module ZIP is built by GitHub Actions after validation passes.
+
+```text
+Validate module files -> Check theme assets -> Package ZIP -> Upload artifact
+```
+
+## Customer status
+
+This release is ready for customer testing after the GitHub Actions build passes.
+
+## Needs real device testing
+
+- OPPO Android 15/16/17
+- realme Android 15/16/17
+- OnePlus Android 15/16/17
+- Lock screen behavior
+- Home screen behavior
+- Icons and sounds
+- LSPosed experimental mode