Запрос на слияние 'feat/entry_point' (#1) из feat/entry_point в master

docs: update README installation steps

test: add postman collection

feat: add entry point for api(main.py)

style: linter black

docs: update README installation steps

test: add postman collection

feat: add entry point for api(main.py)

style: linter black

feat: add new 2 routs for filtering and sort forms

fix(tests): typing in tests

test(routers): add tests for api on http level

chore: initialization

feat: add submission routers

feat: add CRUD and other routers for forms

feat: auth routers

fix: add new submit response schema for correct work of submit router

fix(api): avoid MissingGreenlet by eager-loading form owner

test: add CRUD and access-control coverage for form service

test: add coverage for form listing filters and sorting

feat(services): add 2 funcs for future routers; 1) sort by title/created_at (asc or desc); 2) get forms filtred by title

feat(services): submission funcs and initialization

feat: CRUD forms

fix(schemas): fix typing and logic in form schemas

style(service): linter black

feat: functions for reg and auth users

feat: add exc away from services