update README, wiki, used libraries, screenshots, whats new dialog

[deadlocker8]

• README
• wiki
• used libraries (about page)
• screenshots
  • new navbar sub menu for transactions + templates + recurring overview
• what's new dialog

[deadlocker8]

✨ New features

• added a new workflow to create transactions via importing a CSV file from your bank create transactions based on bank documents #724
• added new overview page for active recurring transactions recurring transactions overview #460

✏️ Improvements

• show balance of previous month and balance of current month instead of rest show balance of previous month and balance of current month instead of rest #725
• updated dependencies update dependencies #726

🐛 Bugfixes

⚠️Deprecations

Minimum supported version of BudgetMaster database is now v2.10.0

❗ If you are still using BudgetMaster v2.9.2 or earlier, please make sure to upgrade to v2.10.0 prior to using this release! ❗

Minimum supported version for JSON import is now 4

❗ BudgetMaster database exports (JSON files) from version prior to v2.5.0 (version code 3 or less inside the JSON) can no longer be imported ❗