* fix: copy previous user files from /opt/grist_bak
related to issue #2421
* chore: add more logging when running update scripts
they can take a long time, and a user may think its stuck
* feat: create grist helper scripts, and json
create new scripts for https://github.com/gristlabs/grist-core
based on homarr scripts
* fix: move rm of zip into "clean up"
* fix: remove second source
* fix: include 'v' in release messages
* fix: use full path to remove release zip
* fix: update copyright
* fix: combine nodejs installers into one section
* fix: comment spacing
* fix: copy .env file from existing grist_bak dir
* fix: ensure "install:python" is run to install python deps
