engine: parameter schemas for every command

cmd/forms.rs describes each command's parameters: model definitions (sets,
materials with elasticity, plasticity, hyperelasticity, damage, thermal and fluid
options, sections, reference points, couplings, masses, springs, boundary
conditions, loads, fluid domains, steps including nonlinear and explicit),
meshers, solvers, deck export, files and results. Tests check that every command
has a form and that a form's defaults are accepted or refused only for the
required fields left empty.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/engine/src/cmd/model.rs

@@ -4,25 +4,26 @@ use serde_json::{Value, json};
 use super::{listed, name};
 use crate::{CommandKind, CommandSpec, EngineError, Result, Session};
 
-pub const INFO: CommandSpec = CommandSpec { id: "model.info", label: "Model Info", params: "{}", form: None, kind: CommandKind::Model, run: info };
+pub const INFO: CommandSpec =
+    CommandSpec { id: "model.info", label: "Model Info", params: "{}", form: Some(&[]), kind: CommandKind::Model, run: info };
 
 pub const UNITS: CommandSpec = CommandSpec {
     id: "model.units",
     label: "Unit System",
     params: r#"{"system": "m-kg-s-N-Pa|mm-t-s-N-MPa|mm-kg-ms-kN-GPa|mm-g-ms-N-MPa|in-lbf-s-psi|unspecified"} — labels the system the model's numbers are in; nothing is converted"#,
-    form: None,
+    form: Some(super::forms::UNITS),
     kind: CommandKind::Model,
     run: units,
 };
 
 pub const CHECK: CommandSpec =
-    CommandSpec { id: "model.check", label: "Check Model", params: "{}", form: None, kind: CommandKind::Model, run: check };
+    CommandSpec { id: "model.check", label: "Check Model", params: "{}", form: Some(&[]), kind: CommandKind::Model, run: check };
 
 pub const SET_RESOLVE: CommandSpec = CommandSpec {
     id: "model.set.resolve",
     label: "Resolve Set",
     params: r#"{"name": "root"} — the set's nodes, elements and element faces on the current mesh (the first 100 of each); fails naming every member that is not on the mesh"#,
-    form: None,
+    form: Some(super::forms::SET_RESOLVE),
     kind: CommandKind::Model,
     run: set_resolve,
 };