Tooling improvements (#34)

* feat: update tsconfig, uninstall vercel/ncc package and use tsc to build project

* feat: install 1password/front-end-style and configure Prettier

* feat: configure ESLint and fix lint errors

* build(deps): update types/node package to latest version

* feat: configure Jest

* feat: add 'validate' script to run formatting/linting/testing/building all together

* build: rebuild the dist/index.js file

* feat: make NPM scripts more granular

* refactor: make it clearer that Prettier config is being loaded from an existing dependency

* feat: add Husky and lint-staged to run pre-commit and pre-push checks

* fix: lint-staged testing step and Jest config file

* build(deps): update types/node package to latest version

* refactor: remove findrelated test script

* fix: move tsconfig.json to root directory, reinstall vercel/ncc for building

* fix: call to run function in index.ts

* build: rebuild the dist/index.js file

* fix: replace CommonJS __dirname with an ESModule equivalent

* fix: ignore config/.husky during ShellCheck

* fix: ignore .husky directory during ShellCheck

* fix: update lint.yml config to match ShellCheck README.md

* fix: remove coveragePathIgnorePatterns option from Jest config since node_modules is already the default value

* refactor: use './' prefix to refer to folders in the current directory in tsconfig.json

* fix: handle edge case where Error constructor is modified and add comments for context

* feat: bump package.json version to 1.2.0 to match current release

* fix: update lint.yml to use ShellCheck 2.0.0 exact version

* build(deps): update types/node package to latest version

* fix: update package-lock.json version 1.2.0

* feat: remove pre-commit and pre-push NPM scripts to simplify package.json

* fix: remove empty 'Default' column from 'configure Action Inputs' table

* fix: change the default values in action.yml to strings as per YAML validation

config/jest.config.js

@@ -0,0 +1,19 @@
+const jestConfig = {
+	/**
+	 * Jest docs: "We recommend placing the extensions most commonly used in your project
+	 *             on the left, so if you are using TypeScript, you may want to consider
+	 *             moving 'ts' to the beginning of the array."
+	 *
+	 * https://jestjs.io/docs/configuration#modulefileextensions-arraystring
+	 */
+	moduleFileExtensions: ["ts", "js", "json"],
+	rootDir: "../src/",
+	testEnvironment: "node",
+	testRegex: "(/__tests__/.*|(\\.|/)test)\\.ts",
+	transform: {
+		".ts": ["ts-jest"],
+	},
+	verbose: true,
+};
+
+export default jestConfig;