feat: convert from mdbook to Grav format

- Rename src/ to pages/
- Add Grav frontmatter to markdown files
- Create numbered folder structure
- Remove mdbook-specific files

Migration from mdbook to Grav CMS.

pages/01.home/default.md

@@ -0,0 +1,20 @@
+---
+title: 'TeamRental.net
+'
+menu: 'TeamRental.net
+'
+---
+
+# TeamRental.net
+
+## Executive Summary
+
+- Idea is to have a freelance platform that isn’t horrible like upwork/guru etc has become.
+- Would cross/up sell MerchantsOfHope/YDN.
+- Joint venture with DevWranglers (a non TSYS Group company).
+- MSP (for IT consulting ongoing recrurring passive revenue).
+- Dev Agency(for R&D consulting).
+
+## Reduction to practice
+
+- [GIT Organization](https://git.knownelement.com/TeamRental.net)