feat(tools): adds a small tools to monitor players.

tools/usercheck/README.md

@@ -0,0 +1,54 @@
+# usercheck
+
+CLI tool to query connected users and server status from the Erupe database.
+
+## Build
+
+```bash
+go build -o usercheck
+```
+
+## Usage
+
+```bash
+./usercheck <command> [options]
+```
+
+### Commands
+
+| Command | Description |
+|---------|-------------|
+| `list` | List all currently connected users |
+| `count` | Show count of connected users per server |
+| `search` | Search for a connected user by name |
+| `servers` | Show server/channel status |
+| `history` | Show login history for a player |
+
+### Examples
+
+```bash
+# List connected users
+./usercheck list -password "dbpass"
+
+# Verbose output with last login times
+./usercheck list -v -password "dbpass"
+
+# Search for a player
+./usercheck search -name "Hunter" -password "dbpass"
+
+# Show server status
+./usercheck servers -password "dbpass"
+
+# Player login history
+./usercheck history -name "Hunter" -password "dbpass"
+```
+
+### Database Options
+
+| Flag | Env Variable | Default |
+|------|--------------|---------|
+| `-host` | `ERUPE_DB_HOST` | localhost |
+| `-port` | - | 5432 |
+| `-user` | `ERUPE_DB_USER` | postgres |
+| `-password` | `ERUPE_DB_PASSWORD` | (required) |
+| `-dbname` | `ERUPE_DB_NAME` | erupe |