fix: install color_eyre error handler in main

This puts it outside of any tests, as running this in parallel will
panic.

src/lib.rs

@@ -96,8 +96,6 @@ impl FullCtx {
 
 #[cfg_attr(test, mutants::skip)]
 pub async fn run(ctx: &Ctx) -> color_eyre::Result<()> {
-    color_eyre::install()?;
-
     let commands = Commands::parse();
     if commands.log {
         tracing::subscriber::set_global_default(

src/main.rs

@@ -6,5 +6,6 @@ use trello_to_deck::{run, Ctx};
 #[tokio::main]
 #[cfg_attr(test, mutants::skip)]
 async fn main() -> Result<()> {
+    color_eyre::install()?;
     run(&Ctx::from(std::env::current_dir()?)).await
 }