feat: departures multi-section auto-sizing

* Update departures widget generation to pass layout parameters from
  configuration to the frontend.

* Replace existing auto-sizing implementation, which only worked for a
  single section, with a version that handles multiple sections using
  the layout parameters.

* The auto-sizing itself (independent of the React component) is
  unit-tested. These are the first real frontend tests in Screens, so
  we take the opportunity to:

  * Update Jest to its latest version.

  * Replace the third-party `@types/jest` package with a direct
    dependency on `@jest/globals`, which is already part of Jest. The
    only advantage of the former is that it allows using `describe`,
    `test`, etc. without importing them.

  * Add `eslint-plugin-jest` to our ESLint setup.

  * Add `fishery` for defining factories to build test data.

assets/css/bus_eink_v2.scss

@@ -14,6 +14,7 @@
 @import "v2/eink/link_footer";
 @import "v2/eink/fare_info_footer";
 @import "v2/eink/free_text";
+@import "v2/eink/departures";
 @import "v2/eink/departures/alert";
 @import "v2/eink/no_data";
 @import "v2/eink/page_load_no_data";

assets/css/gl_eink_v2.scss

@@ -23,6 +23,7 @@
 @import "v2/eink/departures_no_data";
 @import "v2/eink/subway_status";
 
+@import "v2/eink/departures";
 @import "v2/eink/departures/overnight";
 @import "v2/eink/no_data";
 @import "v2/eink/page_load_no_data";

assets/css/v2/eink/departures.scss

@@ -0,0 +1,3 @@
+.departures-container {
+  height: 100%;
+}

assets/eslint.config.mjs

@@ -3,13 +3,18 @@ import pluginJs from "@eslint/js";
 import tseslint from "typescript-eslint";
 import pluginReactConfig from "eslint-plugin-react/configs/recommended.js";
 import eslintConfigPrettier from "eslint-config-prettier";
+import jestPlugin from "eslint-plugin-jest";
 
 export default [
   { languageOptions: { globals: globals.browser } },
   pluginJs.configs.recommended,
   ...tseslint.configs.recommended,
   pluginReactConfig,
   eslintConfigPrettier,
+  {
+    files: ["test/**"],
+    ...jestPlugin.configs["flat/style"],
+  },
   {
     settings: { react: { version: "detect" } },
     rules: {

assets/jest.config.js

@@ -0,0 +1,18 @@
+// https://jestjs.io/docs/configuration
+
+/* eslint-disable @typescript-eslint/no-var-requires */
+/* global require, module */
+
+const requireJSON5 = require("require-json5");
+const { pathsToModuleNameMapper } = require("ts-jest");
+const { compilerOptions } = requireJSON5("./tsconfig");
+
+/** @type {import('jest').Config} */
+module.exports = {
+  preset: "ts-jest",
+  errorOnDeprecated: true,
+  resetMocks: true,
+  roots: ["<rootDir>"],
+  modulePaths: [compilerOptions.baseUrl],
+  moduleNameMapper: pathsToModuleNameMapper(compilerOptions.paths),
+};