feat(windows): add text channel with preview offset for windows (#514)

![image](https://github.com/user-attachments/assets/9f8935db-82fe-4235-8584-ab8b0508b20f)

cable/windows-channels.toml

@@ -4,6 +4,14 @@ name = "files"
 source_command = "Get-ChildItem -Recurse -File | Select-Object -ExpandProperty FullName"
 preview.command = "bat -n --color=always {}"
 
+# Text
+[[cable_channel]]
+name = "text"
+source_command = "rg . --no-heading --line-number"
+preview.command = "bat -n --color=always {0}"
+preview.delimiter = ":"
+preview.offset = "{1}"
+
 # Directories
 [[cable_channel]]
 name = "dirs"

television/channels/cable.rs

@@ -85,7 +85,12 @@ impl Channel {
                     };
 
                     return Entry::new(name).with_line_number(
-                        offset_str.parse::<usize>().unwrap(),
+                        offset_str.parse::<usize>().unwrap_or_else(|_| {
+                            panic!(
+                                "Failed to parse line number from {}",
+                                offset_str
+                            );
+                        }),
                     );
                 }
             }