client-setup package requires OCI installation - will not work with KPT procedure - adjust readme and 766 script

There are 4 packages installed for a base landing zone
- solutions/core-landing-zone
- solutions/client-setup
- solutions/client-landing-zone
- solutions/gatekeeper-policies

The 2nd package can only be installed via the OCI procedure - not raw KPT like core-landing-zone - because rootsync is built in by default

repo-url must be set
```
repo-url: git-repo-to-observe
repo-branch: main
repo-dir: csync/deploy/env

```
or we deploy via
```
michael@cloudshell:~/kcc-cso/github/pubsec-declarative-toolkit/solutions (kcc-cso-4380)$ ./setup.sh -b kcc-cso -u cso2 -n false -c false -l false -m true -o false -g false -h false -r false -d false -j false -p kcc-cso-4380

kpt live apply $REL_SUB_PACKAGE --reconcile-timeout=15m --output=table

config-man RootSync/client-cso2-csync Successful Failed Stalled 25s Secret git-creds not found: create one t
``