Wire plugin file install command

crates/ely_app/src/shell/command_actions.rs

@@ -0,0 +1,49 @@
+use ely_domain::CommandIntent;
+use gpui::{Context, Window};
+
+use super::ElyShell;
+
+impl ElyShell {
+    pub(super) fn handle_shell_command_intent(
+        &mut self,
+        intent: Option<&CommandIntent>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
+    ) {
+        let Some(CommandIntent::Command(command)) = intent else {
+            return;
+        };
+
+        if install_plugin_from_file_command(command) {
+            self.choose_plugin_package(window, cx);
+        }
+    }
+}
+
+fn install_plugin_from_file_command(command: &str) -> bool {
+    matches!(
+        command.trim().to_ascii_lowercase().as_str(),
+        "install-plugin-from-file"
+            | "install plugin from file"
+            | "install-plugin"
+            | "install plugin"
+    )
+}
+
+#[cfg(test)]
+mod tests {
+    use super::install_plugin_from_file_command;
+
+    #[test]
+    fn install_plugin_from_file_command_matches_prd_aliases() {
+        assert!(install_plugin_from_file_command("install-plugin-from-file"));
+        assert!(install_plugin_from_file_command("Install Plugin from File"));
+        assert!(install_plugin_from_file_command("install plugin"));
+    }
+
+    #[test]
+    fn install_plugin_from_file_command_rejects_other_plugin_commands() {
+        assert!(!install_plugin_from_file_command("plugins"));
+        assert!(!install_plugin_from_file_command("open plugins"));
+    }
+}