docs: replace stale 'android' name mentions with 'iris'

The plugin is named 'iris' (IrisAdapter, IRIS_HOME_CHANNEL, label Iris),
but several docs still referred to it as the android platform/plugin and
to the product as 'the Android app'. Rename name-mentions to iris/IRIS
and product-mentions to 'Iris app'; keep legitimate OS references
(androidApp, Android SDK, Android 10, androidx, test_android.py, ...).

Also includes pi-lens markdown-lint autofixes (table spacing, trailing
newlines) in the touched files.

docs/03-gateway-plugin.md

@@ -12,7 +12,7 @@ and the canonical example `hermes-agent/plugins/platforms/irc/adapter.py`.
 
 ```yaml
 name: iris-platform
-label: Android
+label: Iris
 kind: platform
 version: 0.1.0
 description: >
@@ -24,7 +24,7 @@ author: <you>
 requires_env:
   - name: IRIS_TOKEN
     description: "Shared pairing token the app presents on connect"
-    prompt: "Android pairing token"
+    prompt: "Iris pairing token"
     password: true
 optional_env:
   - name: IRIS_WS_HOST
@@ -35,7 +35,7 @@ optional_env:
     description: "WS port (default 8790)"
     prompt: "WS port"
     password: false
-  - name: ANDROID_HOME_CHANNEL
+  - name: IRIS_HOME_CHANNEL
     description: "Default chat id for cron/notification delivery (default default)"
     prompt: "Home channel"
     password: false
@@ -97,7 +97,7 @@ def register(ctx):
         install_hint="No extra packages needed (websockets + httpx are core deps)",
         setup_fn=interactive_setup,           # hermes gateway setup flow
         env_enablement_fn=_env_enablement,    # seed extra + home_channel from env
-        cron_deliver_env_var="ANDROID_HOME_CHANNEL",
+        cron_deliver_env_var="IRIS_HOME_CHANNEL",
         standalone_sender_fn=_standalone_send,  # best-effort out-of-proc cron (stretch)
         parse_target_ref_fn=_parse_target_ref,  # "iris:<chat>[:<thread>]"
         allowed_users_env="IRIS_ALLOWED_USERS",