add scripts with Package aliases and update Release process in README

[aleksandr-kotlyar]

What?

Added bash script aliases for new release process

1. bump_version.sh - automatically updates both selene/__init__.py:__version and pyproject.toml:version
2. build.sh - building project with poetry
3. publish.sh - publishing project with poetry.
4. bump_version_and_publish.sh - do everything above.

Updated Release process in README:

1. bump version via bash .run/bump_version.sh x.x.x
2. build via bash .run/build.sh
3. publish via bash .run/publish.sh

or

bash .run/bump_version_and_publish.sh x.x.x

or

1. manually bump version in pyproject.toml and selene/__init.py:__version__
2. poetry publish --build

Why?

1. To make release more easier and automated.
2. Since moved setup.py to pyproject.toml - old release process instruction has became out of date and we need new release process instruction.