Implement secure password generation (#8)

README.md

@@ -38,6 +38,9 @@ Typed list/show/find/decrypted-grep models and secret presentation selection are
 documented in [`docs/read-domains.md`](docs/read-domains.md).
 Insert modes, concurrency-safe edit sessions, and the secure CLI editor-file
 boundary are documented in [`docs/write-domains.md`](docs/write-domains.md).
+Unbiased password generation, character-set validation, in-place replacement,
+and presentation actions are documented in
+[`docs/password-generation.md`](docs/password-generation.md).
 
 ## Project layout