feat: move project from poetry to pdm, rewrite from scratch and add

basic `notebooks`, `edit` and `show` commands

README.md

@@ -1,10 +1,23 @@
 # halig
 
-[![Build Status](https://qa.roboces.dev/api/badges/catalin/halig/status.svg?ref=refs/heads/main)](https://qa.roboces.dev/catalin/halig)
+[(r)age](https://github.com/woodruffw/pyrage) encrypted note-taking CLI app
+
+## install and init
+
+You can use plain `pip` but I'd recommend `pipx`
+
+```shell
+pipx install halig
+```
+
+## cli mode
 
 ```shell
-$ halig init # create and write $HOME/.config/halig/halig.yml
 $ halig edit some_notebook # edit today's note
 $ halig edit some_notebook/foo # edit  /path/to/some_notebook/foo.age
 $ halig notebooks # list current notebooks
 ```
+
+## tui mode
+
+wip