[FEATURE] Transaction fees

[Cyanhead]

Please confirm the following:

• [X] I've checked the current issues for duplicate issues.
• [X] I've requested a single (only one) feature/change in this issue. It complies with the One Request Per GitHub Issue (ORPGI) rule.
• [X] My issue is well-defined and describes how it should be implemented from UI/UX perspective.

What do you want to be added or improved?

As a user I want to be able to enter an optional transaction fee for all kinds of transactions.

Why do you need it?

• There are fees sometimes when I transfer between my accounts (due to local bank policies), and I currently enter these fees as new entries.
  • For example; I own accounts A and B. Account A sends $10 to account B. A fee of $0.05 is deducted, putting the total expense to $10.05. Account B however, only receives $10. I now have to create a new entry to account for the $0.05.
• To save a little bit more time and for better accuracy.

How do you imagine it?

• When entering a transaction, the user can toggle an optional fee checkbox that reveals an input field where they can either set the exact fee amount, or a percentage of the main transaction amount.
• On the home screen, the fee can be show in smaller text just below the transaction amount of each transaction that has a fee.
• (Optionally, the feature would persist on recurring transactions as well)

[ivywallet]

Thank you @Cyanhead for raising Issue #3229! 🚀 What's next? Read our Contribution Guidelines 📚.

Tagging @ILIYANGERMANOV for review & approval 👀

[Cyanhead]

Ivy Wallet is beautiful, and I want to say a big THANK YOU to the team and contributors. I wish I could close some of the issues myself, but I only know JS and react 😅. If I ever pick up Kotlin, this will be my first destination.