Add package for sharing jest configuration for upcoming Features (#7198)

* Add package for shared jest configurations for Lens applications, Features and libraries.

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Add root level script for running unit tests in monorepo mindset

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

* Ignore coverage files from VCS

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

---------

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

packages/infrastructure/jest/monorepo-package-config.js

@@ -0,0 +1,55 @@
+module.exports = (rootDir) => {
+  const shared = {
+    transform: {
+      "^.+\\.(t|j)sx?$": ["@swc/jest", { cwd: rootDir }],
+    },
+
+    clearMocks: true,
+    coverageDirectory: "coverage",
+    coverageProvider: "v8",
+    coverageReporters: ["lcov"],
+    collectCoverage: true,
+    testMatch: ["**/?(*.)+(test).{js,ts,tsx}"],
+    watchPathIgnorePatterns: ["/node_modules/", "/coverage/", "/build/"],
+
+    collectCoverageFrom: [
+      "<rootDir>/src/**/*.{ts,tsx}",
+      "!<rootDir>/src/**/*.no-coverage.ts",
+    ],
+
+    moduleNameMapper: {
+      "^electron$": "identity-obj-proxy",
+    },
+
+    coverageThreshold: {
+      global: {
+        branches: 100,
+        functions: 100,
+        lines: 100,
+        statements: 100,
+      },
+    },
+  };
+
+  const configForNode = {
+    ...shared,
+    testEnvironment: "node",
+  };
+
+  const configForReact = {
+    ...shared,
+
+    moduleNameMapper: {
+      "\\.(css|scss)$": "identity-obj-proxy",
+      ...shared.moduleNameMapper,
+    },
+
+    testEnvironment: "jsdom",
+    setupFilesAfterEnv: [`${__dirname}/setup-react-tests.ts`],
+  };
+
+  return {
+    configForReact,
+    configForNode,
+  };
+};