Problem with our data generator

[l4nz8]

Improve our data generator, otherwise we can't use it.

• Column names are not the same.
• The date format is wrong (should be a separate column [day, month, year]).
• The order (sequence) of the columns are not the same.
• does not need time as a column.
• We need 3 generators for expense_dataset, recurring_dataset and income_dataset.
• Data should be saved as .csv files.
• The categories and subcategories updated (refer streamlit_function.py for new cat. and subcat.)

Please refer our existing dataset to get the correct column and its data

[till-teb]

Jeah, i did also recognised that problems. @velixko we should fix that.