How to create a new type of release?

Zephyr RTOS application has a `VERSION` file which can be picked up by Zephyr project CMake and compiled into binary.
Is there a way I can hack `simple` strategy and generate `VERSION` instead of `version.txt`?
The `VERSION` file looks like this:
```
VERSION_MAJOR = 0
VERSION_MINOR = 0
PATCHLEVEL = 0
VERSION_TWEAK = 0
EXTRAVERSION = unstable

```

Start by locating the `simple` strategy and the code that generates `version.txt`; then inspect how the release action handles custom version-file formats. Confirm the expected Zephyr `VERSION` contents and document or test the configuration needed to generate that file instead.

Written by the indexing model from the issue text.