Decompose monolithic readme into docs/ directory structure

docs/values/assert.md

@@ -0,0 +1,13 @@
+[Overview](../overview.md) | [Installation](../installation.md) | [Usage](../usage.md) | [Types](../types/) | **Values** | [Syntax](../syntax/) | [TypeRegistry](../type-registry.md) | [TypeCheck](../type-check.md)
+
+# Assert
+
+Use the Assert function to assert a value is valid.
+
+```typescript
+let value: unknown = 1;
+
+Value.Assert(Type.Number(), value); // throws AssertError if invalid
+```
+
+Back to [Home](../../readme.md)