Initial commit: HACS-ready Home Assistant integration

Remote Media Player integration for controlling PC media playback
from Home Assistant via the Media Server API.

Features:
- Full media player controls (play, pause, stop, next, previous)
- Volume control and mute
- Seek support with smooth timeline updates
- Real-time updates via WebSocket
- Script buttons for PC control (shutdown, restart, lock, etc.)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

custom_components/remote_media_player/strings.json

@@ -0,0 +1,61 @@
+{
+  "config": {
+    "step": {
+      "user": {
+        "title": "Connect to Media Server",
+        "description": "Enter the connection details for your Media Server.",
+        "data": {
+          "host": "Host",
+          "port": "Port",
+          "token": "API Token",
+          "name": "Name",
+          "poll_interval": "Poll Interval"
+        },
+        "data_description": {
+          "host": "Hostname or IP address of the Media Server",
+          "port": "Port number (default: 8765)",
+          "token": "API authentication token from the server configuration",
+          "name": "Display name for this media player",
+          "poll_interval": "How often to poll for status updates (seconds)"
+        }
+      }
+    },
+    "error": {
+      "cannot_connect": "Failed to connect to the Media Server. Please check the host and port.",
+      "invalid_auth": "Invalid API token. Please check your token.",
+      "unknown": "An unexpected error occurred."
+    },
+    "abort": {
+      "already_configured": "This Media Server is already configured."
+    }
+  },
+  "options": {
+    "step": {
+      "init": {
+        "title": "Options",
+        "data": {
+          "poll_interval": "Poll Interval"
+        },
+        "data_description": {
+          "poll_interval": "How often to poll for status updates (seconds)"
+        }
+      }
+    }
+  },
+  "services": {
+    "execute_script": {
+      "name": "Execute Script",
+      "description": "Execute a pre-defined script on the media server.",
+      "fields": {
+        "script_name": {
+          "name": "Script Name",
+          "description": "Name of the script to execute (as defined in server config)"
+        },
+        "args": {
+          "name": "Arguments",
+          "description": "Optional list of arguments to pass to the script"
+        }
+      }
+    }
+  }
+}