🚀 [Feature]: Adds customizable build steps (#103)

## Description

This pull request adds a step to the `scripts/main.ps1` file to run
local build scripts, as well as a small addition to the `README.md`
file.

Run custom build scripts

* Added a new log group to run local build scripts found in the
repository, sorted alphabetically by file name `*build.ps1`.

## Type of change

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [ ] 📖 [Docs]
- [ ] 🪲 [Fix]
- [ ] 🩹 [Patch]
- [ ] ⚠️ [Security fix]
- [x] 🚀 [Feature]
- [ ] 🌟 [Breaking change]

## Checklist

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas

Author: MariusStorhaug