feat: convert mdbook to Grav format (199 pages)

Converted from mdbook src/ in input/ to Grav pages/ format:
- Added YAML frontmatter to all pages
- Created numbered folder structure (01.home, 02.Bylaws.*, etc.)
- Preserved all content from Bylaws, Handbook, OperatingAgreements,
  Policies, and JointVenture sections

super ultra big merge completed. scope of work clearly defined. let's go build!

Assisted-by: GLM-5 via Crush <crush@charm.land>

pages/86.Handbook.SourceMaterial.engineering.beginners-guide.notes.typescript/default.md

@@ -0,0 +1,28 @@
+---
+title: 'Exercises'
+menu: 'Exercises'
+---
+
+---
+title: Our Notes On TypeScript
+sidebar: Handbook
+showTitle: true
+hideAnchor: true
+---
+
+The best way to learn TypeScript is to read introductory material then get hands on with exercises.
+
+## Exercises
+
+You can complete the exercises on the [TypeScript Playground](https://www.typescriptlang.org/play)
+
+You can use the same [exercises for Python](python) as starting place.
+
+## Great places to learn
+
+- [TypeScript via learnxinyminutes](https://learnxinyminutes.com/docs/typescript/)
+- [TypeScript in 5 minutes](https://www.typescriptlang.org/docs/handbook/typescript-in-5-minutes.html)
+- [TypeScript Handbook](https://www.typescriptlang.org/docs/handbook/intro.html)
+
+**[Back: Technologies to learn](../technologies-to-learn)**
+