This is a Bedrock behavior pack, resource pack, and world template that intentionally don't make much sense.
Check out the releases page for precompressed addon files, which you can import directly into your game (can't be done on consoles).
Or, if you want, generate it from a branch or tag of your choice by running
Package.ps1 (you may need to allow scripts to run on your machine first):
# Generate the default configuration (everything)
.\Package.ps1
# => what.mcaddon
# |- => resource pack
# |- => behavior pack
# \- => world template
# Generate with only the specified components
# (this command is equivilent to the above command)
.\Package.ps1 -Build Resources,Behavior,WorldTemplate
# => what.mcaddon
# |- => resource pack (Resources)
# |- => behavior pack (Behavior; depends on Resources)
# \- => world template (WorldTemplate; depends on Behavior and Resources)
# Generate individual pack files (can be combined with -Build)
.\Package.ps1 -Individual
# => what-behavior.mcpack => behavior pack
# => what-resources.mcpack => resource pack
# => what-world-template.mctemplate => world template