feat(cli): set default log level when adding the log plugin

needs tauri-apps/plugins-workspace#2965

ref #14075

Author: lucasfernog

.changes/default-log-level.md

@@ -0,0 +1,6 @@
+---
+"@tauri-apps/cli": patch:enhance
+"tauri-cli": patch:enhance
+---
+
+Set a default log level filter when running `tauri add log`.

crates/tauri-cli/src/add.rs

@@ -132,6 +132,8 @@ pub fn run(options: Options) -> Result<()> {
     "Builder::new(todo!()).build()"
   } else if plugin == "single-instance" {
     "init(|app, args, cwd| {})"
+  } else if plugin == "log" {
+    "Builder::new().level(tauri_plugin_log::log::LevelFilter::Debug).build()"
   } else if metadata.builder {
     "Builder::new().build()"
   } else {