Documentation OID handling

[ponceta]

Describe the bug
As we chose to remove OID initialization scripts, we have to rework the doc so everyone does not get lost.

To Reproduce
Exact steps to reproduce the behavior:

1. Go to https://teksi.github.io/wastewater/installation-guide/workstation.html#if-you-are-a-data-owner-add-your-own-oid-to-the-project
2. See error

Expected behavior
The documentation is up to date and indicates how to proceed with oid prefix.

1. Why you need an oid (several oid) prefix for your database(s)
2. Where to order it
3. How to insert and activate it / disable the default oid prefix

Screenshots / data
If applicable, add screenshots or data to help explain your problem.

Additional context
Scripts to change OID on the whole database would be nice to have for many users.

[sjib]

There is no magic script to change the (wrong) OID prefix within TEKSI. But you can export your data with INTERLIS and then search and replace in the xtf and then re-import your data in a new empty database. Make sure you have set the prefix first as you want it.