docs: add installation and usage instructions for elpaca, straight.el, and other managers

README.org

@@ -2,7 +2,7 @@
 
 Noise is a Signal Messenger client in Elisp for Emacs powered by https://github.com/AsamK/signal-cli
 
-Its ultimate goal is to provide a fast and efficient user interfae for Signal chats.
+Its ultimate goal is to provide a fast and efficient user interface for Signal chats.
 
 ** Tech stack
 The tech stack is Elisp and SQLite (for storing conversations)
@@ -22,6 +22,134 @@ We follow Emacs conventions for keybindings with the addition of evil support ou
 
 ** User Interface
 
-See the file signal-emacs-ui.html for user interface mockups we're targetting.
+See the file signal-emacs-ui.html for user interface mockups we're targeting.
+
+** Installation
+
+*** signal-cli
+
+Install =signal-cli= and start the daemon in JSON-RPC mode:
+
+#+begin_src shell
+  # Install signal-cli (example using the official tarball)
+  wget https://github.com/AsamK/signal-cli/releases/latest/download/signal-cli.tar.gz
+  tar xf signal-cli.tar.gz
+
+  # Register or link your device
+  signal-cli link -n "emacs-noise"
+
+  # Start the daemon on default port 9128
+  signal-cli daemon --receive-mode=manual
+#+end_src
+
+*** emacs-sqlite3-api
+
+Noise requires the =emacs-sqlite3-api= library for SQLite access. Install it with your
+package manager of choice, then set up Noise itself.
+
+*** Noise Package
+
+Below are recipes for several popular Emacs package managers.
+
+**** elpaca
+
+#+begin_src elisp
+  (use-package noise
+    :ensure (noise
+             :host github
+             :repo "git.roo.lol/jbrechtel/noise"
+             :protocol https)
+    :config
+    ;; Optional: set a custom signal-cli address
+    ;; (setq noise-signal-cli-address "http://localhost:9128")
+
+    ;; Start Noise automatically
+    (noise-mode 1))
+#+end_src
+
+Or, if you prefer the =elpaca= recipe directly without =use-package=:
+
+#+begin_src elisp
+  (elpaca (noise :host github
+                 :repo "git.roo.lol/jbrechtel/noise"
+                 :protocol https))
+
+  (require 'noise)
+  (noise-mode 1)
+#+end_src
+
+**** straight.el
+
+#+begin_src elisp
+  (straight-use-package
+   '(noise :type git :host github
+           :repo "git.roo.lol/jbrechtel/noise"
+           :protocol https))
+
+  (require 'noise)
+  (noise-mode 1)
+#+end_src
+
+**** Quelpa
+
+#+begin_src elisp
+  (quelpa
+   '(noise :fetcher github
+           :repo "git.roo.lol/jbrechtel/noise"))
+
+  (require 'noise)
+  (noise-mode 1)
+#+end_src
+
+**** Manual / package-vc-install (Emacs 29+)
+
+#+begin_src elisp
+  (package-vc-install "https://git.roo.lol/jbrechtel/noise")
+
+  (require 'noise)
+  (noise-mode 1)
+#+end_src
+
+**** Manual clone
+
+#+begin_src shell
+  git clone https://git.roo.lol/jbrechtel/noise ~/.emacs.d/manual-packages/noise
+#+end_src
+
+Then in your init file:
+
+#+begin_src elisp
+  (add-to-list 'load-path "~/.emacs.d/manual-packages/noise")
+  (require 'noise)
+  (noise-mode 1)
+#+end_src
+
+** Usage
+
+Once signal-cli is running and Noise is installed:
+
+- =M-x noise-mode= — toggle the Noise client (opens the chat list)
+- =M-x noise-check-connection= — test connectivity to signal-cli
+
+*** Keybindings
+
+**** Chat list (*signal* buffer)
+
+| Key   | Action                    |
+|-------+---------------------------|
+| =n=   | Next chat                 |
+| =p=   | Previous chat             |
+| =RET= | Open selected chat        |
+| =m=   | Mark chat as read         |
+| =g=   | Refresh chat list         |
+| =/=   | Filter chats              |
+| =q=   | Quit chat list window     |
+| =C-x b= | Switch conversation (minibuffer) |
+
+**** Minibuffer switcher
+
+=M-x noise-switcher= (or =C-x b= from the chat list) opens a fuzzy
+completion interface showing all conversations and contacts. Start
+typing to narrow, then press =RET= to open the selected conversation.