fix: adding fix for newline after < in german gmails

[ThriceGood]

There was already an addition for the English version of this problem. Where a newline is added after the < before the email in the 'from' line (I guess on long email addresses only?).

I also consolidated the two German Gmail regexes into one that handles the following formats:

Am DATE um TIME Uhr schrieb NAME <\nEMAIL>: (new line after first <)
Am DATE um TIME Uhr schrieb NAME :
Am DATE um TIME schrieb NAME:
Am DATE schrieb NAME :

I could not run the tests just to an import issue but ran a separate test for them with the following script:

// Am DATE um TIME Uhr schrieb NAME <EMAIL>:  (new line after first <)
//
const testDE1 = `
Blah blah blah.

Am Fr., 28. Nov. 2025 um 15:57 Uhr schrieb Test Mailer <
testing@testing.com>:

> Test
`

// Am DATE um TIME Uhr schrieb NAME <EMAIL>:
//
const testDE2 = `
Blah blah blah.

Am Fr., 28. Nov. 2025 um 15:57 Uhr schrieb Test Mailer <testing@testing.com>:

> Test
`

// Am DATE um TIME schrieb NAME:
//
const testDE3 = `
Blah blah blah.

Am Fr., 28. Nov. 2025 um 15:57 schrieb Test Mailer:

> Test
`

// Am DATE schrieb NAME <EMAIL>:
//
const testDE4 = `
Blah blah blah.

Am Fr., 28. Nov. 2025 schrieb Test Mailer <testing@testing.com>:

> Test
`


const emails = [testDE1, testDE2, testDE3, testDE4]

emails.forEach((e) => {
  console.log(new EmailReplyParser().parseReply(e).trim())
})

// output
//
// Blah blah blah.
// Blah blah blah.
// Blah blah blah.
// Blah blah blah.

Please run the original tests if you can.

[baptistejamin]

Thank you for this.

I will merge, but once we have other PRs to be batched