Add Maestro-style YAML flow runner for deterministic automation

New --flow mode executes scripted YAML steps without LLM, mapping 17
commands (tap, type, swipe, scroll, etc.) to existing actions. Element
finding uses accessibility tree text/hint/id matching.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

examples/flows/clear-notifications.yaml

@@ -0,0 +1,8 @@
+name: Clear Notifications
+---
+- shell: "cmd statusbar expand-notifications"
+- wait: 2
+- tap: "Clear all"
+- wait: 1
+- home
+- done: "Notifications cleared"

examples/flows/create-contact.yaml

@@ -0,0 +1,16 @@
+appId: com.google.android.contacts
+name: Create Contact
+---
+- launchApp
+- wait: 2
+- tap: "Create new contact"
+- wait: 1
+- tap: "First name"
+- type: "John"
+- tap: "Last name"
+- type: "Snow"
+- tap: "Phone"
+- type: "5551234567"
+- tap: "Save"
+- wait: 2
+- done: "Contact created"

examples/flows/google-search.yaml

@@ -0,0 +1,10 @@
+appId: com.google.android.googlequicksearchbox
+name: Google Search
+---
+- launchApp
+- wait: 2
+- tap: "Search"
+- type: "weather today"
+- enter
+- wait: 3
+- done: "Search results loaded"

examples/flows/send-whatsapp.yaml

@@ -0,0 +1,14 @@
+appId: com.whatsapp
+name: Send WhatsApp Message
+---
+- home
+- wait: 1
+- launchApp
+- wait: 2
+- tap: "Vi"
+- wait: 1
+- tap: "Message"
+- type: "hello from Droidclaw"
+- tap: "Send"
+- wait: 1
+- done: "Message sent"

examples/flows/toggle-wifi.yaml

@@ -0,0 +1,7 @@
+name: Toggle WiFi
+---
+- settings: "wifi"
+- wait: 2
+- tap: "Wi-Fi"
+- wait: 1
+- done: "WiFi toggled"

examples/send-whatsapp-vi.json

@@ -0,0 +1,10 @@
+{
+  "name": "Send WhatsApp to Vi",
+  "steps": [
+    {
+      "app": "com.whatsapp",
+      "goal": "You are on WhatsApp. First check if 'Vi' is visible in the chat list. If it is, tap on it directly. If not, use the Search bar to search for 'Vi' and then tap the result. Once inside the Vi chat, type 'hello from Droidclaw' in the message field and send it.",
+      "maxSteps": 12
+    }
+  ]
+}