doc: add page about qownnotes-tui

Signed-off-by: Patrizio Bekerle <patrizio@bekerle.com>

Author: pbek

src/libraries/qmarkdowntextedit

@@ -46,6 +46,7 @@ const gettingStartedNavItems = [
   "getting-started/browser-extension",
   "getting-started/homepage-suggestion-api",
   "getting-started/command-line-snippet-manager",
+  "getting-started/qownnotes-tui",
   "getting-started/web-app",
   "getting-started/qownnotesapi",
   "getting-started/note-relations",

webpage/src/.vuepress/config.js

@@ -17,6 +17,7 @@ graph TB
         sync("Nextcloud Sync")-->md
         qon-comp("Browser extension")-->qon
         qc("Command-line snippet manager")-->qon
+        tui("QOwnNotes TUI")-->md
         homepage("Homepage dashboard")-->qon
     end
     subgraph Your Nextcloud server
@@ -41,6 +42,7 @@ graph TB
     click md "/getting-started/concept.html#markdown-note-files" "Markdown, media and attachment files in your note folder"
     click qon-comp "/getting-started/concept.html#qownnotes-browser-extension" "QOwnNotes browser extension for managing bookmarks in markdown files and as web clipper"
     click qc "/getting-started/concept.html#qownnotes-command-line-snippet-manager" "QOwnNotes command-line snippet manager"
+    click tui "/getting-started/concept.html#qownnotes-tui" "QOwnNotes TUI, a keyboard-first terminal browser and editor for your Markdown note folders"
     click homepage "/getting-started/concept.html#homepage-dashboard" "Homepage dashboard using QOwnNotes bookmark suggestions"
     click sync "/getting-started/concept.html#nextcloud-desktop-sync-client" "Nextcloud desktop sync client to sync your notes to your server"
     click ncs "/getting-started/concept.html#nextcloud-server" "Nextcloud server to host your notes and other files"
@@ -125,6 +127,17 @@ You can manage your **command snippets** with QOwnNotes and execute them on the
 Please visit [QOwnNotes command-line snippet manager](command-line-snippet-manager.md) for more information.
 :::
 
+## QOwnNotes TUI
+
+You can **browse and edit your notes in the terminal** with the keyboard-first
+[QOwnNotes TUI](https://github.com/qownnotes/qownnotes-tui). It works directly on
+your local Markdown note files and **uses the note folders configured in QOwnNotes**,
+following its note sorting settings.
+
+::: tip
+Please visit [QOwnNotes TUI](qownnotes-tui.md) for more information.
+:::
+
 ## LanguageTool service
 
 QOwnNotes can use a local or remote [LanguageTool](https://languagetool.org/) server for

webpage/src/.vuepress/public/img/qownnotes-tui.webp

@@ -0,0 +1,67 @@
+---
+image: /img/qownnotes-tui.webp
+---
+
+# QOwnNotes TUI
+
+[QOwnNotes TUI](https://github.com/qownnotes/qownnotes-tui) is a keyboard-first
+**terminal browser and editor** for local, QOwnNotes-compatible Markdown note folders.
+It can directly **use the note folders configured in QOwnNotes**, so you can start
+working with your existing notes right away.
+
+![QOwnNotes TUI](/img/qownnotes-tui.webp "Browse and edit your notes in the terminal")
+
+- It uses the **note folders configured in QOwnNotes** and follows its note sorting settings
+  (the QOwnNotes application database is opened read-only)
+- Notes can be **created, edited, searched, syntax-highlighted, renamed from their content**,
+  and **safely deleted** from the terminal
+- Changes are **saved automatically** and external-change conflicts are detected
+- It supports **configurable themes**, **mouse controls**, **Nix**, and a **Home Manager module**
+- Shell completions can be generated for **Bash, Fish, Zsh**, and more
+
+## Installation
+
+Visit the [latest release page](https://github.com/qownnotes/qownnotes-tui/releases/latest)
+and download the version you need.
+
+::: tip
+If you are using [Nix](https://nixos.org/), you can build and run the application directly:
+
+```bash
+nix run github:qownnotes/qownnotes-tui -- --notes-dir ~/Notes
+```
+
+The Nix package installs shell completions for Bash, Fish, and Zsh automatically.
+:::
+
+## Usage
+
+Open a note folder from the command line:
+
+```bash
+qownnotes-tui --notes-dir ~/Notes
+```
+
+If no note folder is given, the application reads all configured note folders from
+QOwnNotes and initially opens the current folder.
+
+Some of the most important keys:
+
+| Key             | Action                                |
+| --------------- | ------------------------------------- |
+| `j`, `k`        | Move selection or scroll the viewer   |
+| `h`, `l`, `Tab` | Switch panes                          |
+| `Enter`         | Activate a note folder or open a note |
+| `n`, `Ctrl-n`   | Create a timestamped note             |
+| `d`             | Delete a note after confirmation      |
+| `e`             | Edit the selected note                |
+| `/`             | Search note names and text            |
+| `Ctrl-s`        | Save the note                         |
+| `Esc`           | Leave editor or return to note list   |
+| `?`             | Show help                             |
+| `q`, `Ctrl-c`   | Quit                                  |
+
+::: tip
+For more information, visit the
+[QOwnNotes TUI repository on GitHub](https://github.com/qownnotes/qownnotes-tui).
+:::