Run prettier across the repo, exclude the lockfile from it

Prettier had never been run in --check mode here before, so this had
drifted across most files (markdown tables, long option() chains,
line wrapping). Purely formatting, no logic changes - needed so a CI
format:check gate can actually pass. Adds .prettierignore for
pnpm-lock.yaml specifically: prettier's YAML formatter rewrites every
quoted key (single -> double quotes) producing an ~8700-line diff of
pure noise on a file pnpm itself owns the formatting of.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/cli/lib/variables.test.ts

@@ -3,7 +3,10 @@ import { test } from "node:test";
 import type { VariableConfig } from "../../lib/config/schema";
 import { coerceVariables, parseVarFlags } from "./variables";
 
-function stringVar(name: string, overrides: Partial<VariableConfig> = {}): VariableConfig {
+function stringVar(
+  name: string,
+  overrides: Partial<VariableConfig> = {},
+): VariableConfig {
   return {
     type: "string",
     name,
@@ -62,18 +65,32 @@ test("parseVarFlags rejects a flag with no '='", () => {
 });
 
 test("coerceVariables coerces booleans and numbers, passes strings through", () => {
-  const variables = [stringVar("environment"), boolVar("dryRun"), numberVar("replicas")];
+  const variables = [
+    stringVar("environment"),
+    boolVar("dryRun"),
+    numberVar("replicas"),
+  ];
   const values = coerceVariables(variables, {
     environment: ["staging"],
     dryRun: ["true"],
     replicas: ["3"],
   });
-  assert.deepEqual(values, { environment: "staging", dryRun: true, replicas: 3 });
+  assert.deepEqual(values, {
+    environment: "staging",
+    dryRun: true,
+    replicas: 3,
+  });
 });
 
 test("coerceVariables rejects an invalid boolean/number", () => {
-  assert.throws(() => coerceVariables([boolVar("dryRun")], { dryRun: ["yes"] }), /must be 'true' or 'false'/);
-  assert.throws(() => coerceVariables([numberVar("replicas")], { replicas: ["abc"] }), /not a valid number/);
+  assert.throws(
+    () => coerceVariables([boolVar("dryRun")], { dryRun: ["yes"] }),
+    /must be 'true' or 'false'/,
+  );
+  assert.throws(
+    () => coerceVariables([numberVar("replicas")], { replicas: ["abc"] }),
+    /not a valid number/,
+  );
 });
 
 test("coerceVariables collects a multiselect variable's repeats into an array", () => {
@@ -85,7 +102,8 @@ test("coerceVariables collects a multiselect variable's repeats into an array",
 
 test("coerceVariables rejects a non-multiselect variable given more than once", () => {
   assert.throws(
-    () => coerceVariables([stringVar("environment")], { environment: ["a", "b"] }),
+    () =>
+      coerceVariables([stringVar("environment")], { environment: ["a", "b"] }),
     /given 2 times/,
   );
 });