docs: 📝 add TSDoc comments for components and functions

* Added JSDoc comments to `DetailItem`, `ProjectInfo`, and `index.tsx` for better documentation.
* Improved code readability and maintainability by providing clear descriptions of parameters and return values.
* Enhanced understanding of the codebase for future developers.

Author: okineadev

src/components/DetailItem.tsx

@@ -1,5 +1,19 @@
 import { Text } from 'ink'
 
+/**
+ * Display a detail item.
+ *
+ * @param label The label.
+ * @param children The children.
+ *
+ * @example
+ * ```tsx
+ * <DetailItem label="🔖 Version">1.0.0</DetailItem>
+ * // 🔖 Version: 1.0.0
+ * ```
+ *
+ * @returns The detail item.
+ */
 const DetailItem = ({
 	label,
 	children,

src/components/ProjectInfo.tsx

@@ -1,9 +1,13 @@
 import type { JSONSchemaForNPMPackageJsonFiles } from '@schemastore/package'
 import { Box, Newline, Text } from 'ink'
 import Divider from 'ink-divider'
-import Link from 'ink-link'
 import DetailItem from './DetailItem'
 
+/**
+ * Display information about the project.
+ *
+ * @param pkg The `package.json`.
+ */
 const ProjectInfo = ({ pkg }: { pkg: JSONSchemaForNPMPackageJsonFiles }) => (
 	<Box
 		borderStyle="round"

src/index.tsx

@@ -3,6 +3,9 @@ import ProjectInfo from './components/ProjectInfo'
 
 import type { JSONSchemaForNPMPackageJsonFiles } from '@schemastore/package'
 
+/**
+ * Load the package.json file from the current working directory.
+ */
 const pkg: JSONSchemaForNPMPackageJsonFiles = await import(
 	`${process.cwd()}/package.json`,
 	{

tests/apr.test.tsx

@@ -3,7 +3,9 @@ import type { JSONSchemaForNPMPackageJsonFiles } from '@schemastore/package'
 import { render } from 'ink-testing-library'
 import ProjectInfo from '../src/components/ProjectInfo'
 
-// @ts-expect-error
+/**
+ * The dummy package.json file from the playground directory.
+ */ // @ts-expect-error
 const pkg: JSONSchemaForNPMPackageJsonFiles = await import(
 	'./playground/package.json',
 	{