feat(expect-webdriverio): add toHaveLocalStorageItem matcher

[NaamuKim]

What I do

Added tests with the toHaveLocalStorageItem function

Why this function is needed

before

const tokenExists = await browser.execute(() => {
    return localStorage.getItem('authToken') !== null
})
expect(tokenExists).toBe(true)

const tokenValue = await browser.execute(() => {
    return localStorage.getItem('authToken')
})
expect(tokenValue).toMatch(/^[A-Za-z0-9-_]+\./)

after

await expect(browser).toHaveLocalStorageItem('authToken')
await expect(browser).toHaveLocalStorageItem('authToken', /^[A-Za-z0-9-_]+\./)

If you need anything else, let me know and I'll get it implemented quickly.
If this API is okay, I'll also add a PR for Session storage.