Refactor README: reorganize and expand docs

Merge branch 'main' of https://github.com/supermarsx/magisk-samsung-dex-standalone-mode

Update changelog for version 2026.1

Credit contributor in changelog

ci: fix changelog version check pattern

ci: update actions to v4

fix: add execute permission to test-release-scripts.sh

tests: disable shellcheck and simplify grep check

Bump version to 2026.1

Add docs to release & version scripts

Use quoted versionCode in tests

Expect versionCode as string in test

Treat update.json versionCode as string

Update release scripts and add tests

Update changelog for 2026.1