[IMP] Improve changes in budget and cash flow

[ADD] Add new model account distribution line
[FIX] Fix functions in cash flow report
[ADD] Add new model cash flow line
[IMP] Improve modules. Organizated both modules and fix some functions
[IMP] Improve structure for cash flow report and budget module. Add new
files and organize functions according to model that they are working
[IMP] Improve changes in cash flow report. Add budget logic for cash
flow distributions.
[FIX] Comment some unnecesary variables
[FIX] Fix translations for cash_flow_report
[IMP] Improve cash flow report. Add no distributed amount and review other functionalities
[IMP] Improve cash flow and account move line distributions.
[FIX] Fix some bugs and file dependecies