const data = {
    hello: 'world',
    someInteger: 1,
    aFloat: 1.40,
    isTrue: false,
    items: [1, 2, 3]
}


function toReadme(data) {
    const keys = Object.keys(data)
    const values = Object.values(data)

    const maxLength = Math.max(...values.map((it) => JSON.stringify(it).length), ...keys.map(it => it.length))
    const keysPadded = keys.map((key) => key.padEnd(maxLength))
    const valuesPadded = values.map((value) => JSON.stringify(value).padEnd(maxLength))

    let readme = `|${keysPadded.join("|")}|\n`
    readme += `|${Array(keysPadded.length).fill(Array(maxLength).fill("-").join("")).join("|")}|\n`
    readme += `|${valuesPadded.join("|")}|\n`
    return readme
}

console.log(toReadme(data))