Wider ranges, an agent guide, patch and effects commands

Every effect's sliders and clamps now reach far (a nudge from a tremor
to an earthquake, a banner that stays minutes). AGENTS.md documents the
file schema, every option and range, the CLI, verification and worked
scenarios for scripts and coding agents; attention-required effects
prints the catalog as JSON, patch merges keys into a rule, docs prints
the guide.

Service.qml

@@ -2,6 +2,7 @@ import QtQuick
 import Quickshell
 import Quickshell.Io
 import "Rules.js" as Rules
+import "EffectCatalog.js" as Catalog
 
 // Headless service: streams every notification the shell puts on screen,
 // runs it past the rules in ~/.config/attention-required/rules.json, and
@@ -602,6 +603,11 @@ Item {
       return "reloading " + root.rulesPath
     }
 
+    // The effect catalog with every option and its range, for scripts and agents.
+    function effects(): string {
+      return JSON.stringify(Catalog.EFFECTS)
+    }
+
     // attention-required toggle | on | off
     function toggle(): string {
       root.setEnabled(!root.enabled)