chore: tooling improvements

- Add cargo-binutils to mise.toml (needed for `just size`)
- Remove jj from mise.toml (optional, not a build dependency)
- Silence `mise install` output when tools are current (--quiet)
- Add `just outdated` recipe with embassy-executor exclusion
  (esp-rtos 0.2 pins embassy-executor ^0.9; 0.10 renamed arch-*
  features to platform-*, which crashes cargo-outdated)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

mise.toml

@@ -3,8 +3,8 @@ rust = "1.93"
 python = "3.14"
 uv = "latest"
 just = "latest"
-jj = "latest"
 
+"cargo:cargo-binutils" = "latest"   # `cargo size`, `cargo objdump`, etc.
 "cargo:espup" = "0.16"
 "cargo:espflash" = "3"              # 4.x has broken nix dependency on current stable Rust
 "cargo:probe-rs-tools" = "0.31"