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"