feat: 🔥 introduce randAmount

[pumano]

generate random amount with possibility to use currency symbol with
amount

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngneat/falso/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[X] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

introduce randAmount it's just randFloat but under the @finance domain and have type string and with possibility to set currency symbol

Does this PR introduce a breaking change?

[ ] Yes
[X] No

Other information

[pumano]

@NetanelBasal could you please release falso? Can't wait for using missed features in my project)