Three unit tests catch the kind of bug that broke weather/set_city (a
phrases array instead of lang→array map silently dropped the whole pack):
- every_command_toml_parses: every resources/commands/*/command.toml round-
trips through toml::from_str::<JCommandsList>. Reports all failures at
once instead of failing on the first.
- lua_command_scripts_exist: for every type="lua" command, the named (or
default script.lua) script file exists in the pack dir.
- every_command_has_phrases: structural commands (terminate/stop_chaining)
excluded, every other command has ≥1 phrase across all languages.
Tests use env!("CARGO_MANIFEST_DIR") -> ../.. -> resources/commands so they
work from any cwd.
NB: cargo test does not run on this machine right now — aws-lc-sys needs
cl.exe (MSVC Build Tools missing). The release binary was built earlier
with MSVC available; toolchain install is a follow-up. The tests are still
valid for CI / a re-armed dev box.
