feat: detect and warn if running as root

src/config.rs

@@ -295,6 +295,8 @@ pub struct Vim {
 #[derive(Deserialize, Default, Debug, Merge)]
 #[serde(deny_unknown_fields)]
 pub struct Misc {
+    allow_root: Option<bool>,
+
     pre_sudo: Option<bool>,
 
     sudo_command: Option<SudoKind>,
@@ -767,6 +769,10 @@ pub struct CommandLineArgs {
     #[arg(long = "show-skipped")]
     show_skipped: bool,
 
+    /// Suppress warning and confirmation prompt if running as root
+    #[arg(long = "allow-root")]
+    allow_root: bool,
+
     /// Tracing filter directives.
     ///
     /// See: https://docs.rs/tracing-subscriber/latest/tracing_subscriber/filter/struct.EnvFilter.html#directives
@@ -1535,6 +1541,16 @@ impl Config {
             .unwrap_or(true)
     }
 
+    pub fn allow_root(&self) -> bool {
+        self.opt.allow_root
+            || self
+                .config_file
+                .misc
+                .as_ref()
+                .and_then(|misc| misc.allow_root)
+                .unwrap_or(false)
+    }
+
     pub fn sudo_command(&self) -> Option<SudoKind> {
         self.config_file.misc.as_ref().and_then(|misc| misc.sudo_command)
     }