Creating files with testdata

I am developing a complex multi-tenant application in postgresql 16 in Linux. During the development I would like to be
ableto enter test data into various related tables at any given time for testing purposes. 

While this can certainly be accomplished by predefined CTE INSERT statements in an SQL file, I would prefer something
moreflexible. I am thinking of using a markdown file as a source for these CTE INSERT statements. Specifically, having
acertain structure in the markdown file where a given markdown heading level, bullet level etc. would correspond to
specifictables and columns. 

After entering my test data into the markdown file for the given test scenario, I would then run an awk script or
similarto create a SQL file with the various CTE INSERT statements. Howevever, it gets complex since I need to handle
1:Nrelationships between tables in the markdown file... 

I hope the above outline is understandable and am interested in comments and thoughts on my above approach.

Thanks.