build: bacon is better than cargo-watch

- Shows errors before warnings
- Keep the list updated without flickering when the code changes. I don't need
`spacer` anymore
- Has scroll indicator
- Doesn't have issue with `Permission denied (os error 13)`

justfile

@@ -11,7 +11,7 @@ _default:
 
 # Setup the repository.
 setup: _areyousure
-    just _cargo-install 'cargo-edit cargo-nextest cargo-outdated cargo-watch dprint git-cliff spacer typos-cli'
+    just _cargo-install 'cargo-edit cargo-nextest cargo-outdated dprint git-cliff bacon typos-cli '
 
 # Tasks to make the code-base comply with the rules. Mostly used in git hooks.
 comply: _doc-check fmt lint test
@@ -21,7 +21,7 @@ check: fmt-check lint test
 
 # Develop the app.
 dev:
-    cargo watch -x 'clippy --all-targets --all-features' | spacer
+    bacon
 
 # Format the codebase.
 fmt: