Painful process of sign-up with keepass into any website/app, should be enhanced

**Is your feature request related to a problem? Please describe.**

When I sign up to a new website, I don't have an option to automatically fill the username and password (with a new Keepass secure and unique password) with the click of one button. I have to go through 15 taps on different parts of my screen for simply creating a mail/password entry within Keepass. This is way too inconvenient. Is there a way to smooth up the process when signing up on a new website? I come from Kaspersky Password Manager and I left it because it was slow as hell, but it did suggest "add new account" when signing up and with 4/5 taps I had a new secure password and the entry added to the database. These are the steps required as of now:

1. Click on username entry
1. Clicking "Sign in with Keepass" (sometimes it does not appear until I click again on password entry)
1. If database not opened, I have to click for biometric login
1. I get to a screen saying "Selection mode (Autofill)"
1. Click '+' floating action button
1. Click 'Add entry'
1. Click Username
1. Type my email (4 taps then mail gets suggested by my keyboard)
1. Click the dice to generate a password
1. Click on the tick at the bottom of the page to validate the password
1. Click again on the tick at the bottom
1. I get returned to the website
1. Click again on the entry I just created
1. Click on "Sign up" button of the website

**Describe the solution you'd like**
A simplified procedure when signing-up and creating new account/password entries, that automatically suggests a unique secured password with one tap - respecting the default settings for password generation - and fills the username automatically with one of the most used (or that it suggest to choose from a pre-loaded list of mails/usernames in the database)

Example :
1. Click on username entry
3. A new popup or a button in the keyboard opens, along the "Sign-in with Keepass" maybe saying "Sign-up with Keepass".
4. Click on "Sign-up with Keepass" it can ask for authentication if needed to open the database, then it would go back to the website automatically
5. It would automatically fill username/mail with most used username/mail in database and it would fill password with a new secure password generated by keepass.
6. I can change the username if I needed, but often I suppose I wouldn't. If I click on username though a list proposing other commonly used username/mail in database. If I want another user, then another two clicks would be required.
7. Click on website's sign-up button. When clicking on this button, then the entry would be added to the database, along with the URL and with a default name. Other fields would be empty.

This procedure would allow for 3 clicks instead of 15 in the best case scenario, and in the worst case maybe 5 or 6.

**Describe alternatives you've considered**
I haven't got an alternative, seems like it's the only way to sign up for now? If there's another way I'm eager to hear about it :)

Start by reviewing the existing Android Autofill flow around the "Sign in with Keepass" action, "Selection mode (Autofill)" screen, and entry creation flow. Compare that behavior with the requested sign-up flow, including authentication, username selection, password generation, and saving the URL. Done means a sign-up action can create and fill a new entry with substantially fewer steps.

Written by the indexing model from the issue text.