feat: add TATS03 app idea

Projects/2-Intermediate/personal-finance.md

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+# my-fi
+
+**Tier:** 2-Intermediate
+
+a soft tool that allows any user to keep control of their personal finances in everyday life.
+
+## User Stories
+
+-   [ ] User can list their source of income
+-   [ ] User can list their expenses
+-   [ ] User can allocate an expense to a source of income
+-   [ ] User can make loan
+-   [ ] User can record the return of the loan
+-   [ ] User can list the loans
+-   [ ] User can  attach a loan to a specific source of income
+-   [ ] User can make assessments,
+
+## Bonus features
+
+-   [ ] User can make assessments for each source of income
+-   [ ] User can make daily, monthly or specific period assessments
+
+
+## Example projects
+
+mobilss is a mobile app allow to get controll and track our money
+https://www.mobillsapp.com/?dd_pm=none&dd_pm_cat=finance_app