Allow to create a new ledger file from the app

[lrq3000]

Currently the app only suggests to open an already existing ledger file. Howeve to onboard new users more easily, it would be better to offer an alternative option to create a new ledger file, as this is difficult for most Android users without using power user apps such as totalcommander.

[Jenish-1235]

Hello there, I would like to contribute to this issue, during hacktoberfest 2024. Having 4 years of experience in android app dev, I would love to contribute in enhancing the software.

[chvp]

Feel free to do so! I thought Hacktoberfest wasn't a thing anymore this year, but any contributions are definitely welcome. Feel free to reach out if you have any questions.