add intents docs and samples

samples/intent-sample.lua

@@ -0,0 +1,44 @@
+function on_resume()
+    ui:show_lines{
+        "open browser",
+        "open market",
+        "open google feed",
+        "open player",
+        "send broadcast to launcher (open apps menu)",
+    }
+end
+
+function on_click(idx)
+    if idx == 1 then
+        intent:start_activity{
+            action = "android.intent.action.VIEW",
+            data = "https://aiolauncher.app",
+        }
+    elseif idx == 2 then
+        intent:start_activity{
+            action = "android.intent.action.MAIN",
+            category = "android.intent.category.APP_MARKET",
+        }
+    elseif idx == 3 then
+        intent:start_activity{
+            action = "com.google.android.googlequicksearchbox.GOOGLE_SEARCH",
+            extras = {
+                query = "AIO Launcher",
+            },
+        }
+    elseif idx == 4 then
+        intent:start_activity{
+            action = "android.intent.action.VIEW",
+            category = "android.intent.category.DEFAULT",
+            data = "file:///system/product/media/audio/ringtones/Atria.ogg",
+            type = "audio/ogg",
+    }
+    else
+        intent:send_broadcast{
+            action = "ru.execbit.aiolauncher.COMMAND",
+            extras = {
+                cmd = "apps_menu",
+            },
+        }
+    end
+end