feat: scaffold howtos project

Collection of usage guides and cheatsheets. Includes project docs,
topic template, and directory structure.

docs/TEMPLATE.md

@@ -0,0 +1,26 @@
+# Topic Name
+
+> One-line description of what this tool/subject is.
+
+## Common Commands
+
+```bash
+# description
+command --flag argument
+```
+
+## Examples
+
+```bash
+# Practical example with context
+command --option value
+```
+
+## Gotchas
+
+- Known pitfall or surprising behavior
+
+## See Also
+
+- `related-topic` — brief note
+- [External reference](https://example.com)