docs(pre-commit): shellcheck not found

[boczekbartek]

Describe the bug
When I run pre-commit run -a I get an error that shellcheck is not installed. It's not described in the README that it should be installed.

To Reproduce

pre-commit run -a
...
Shellcheck Bash Linter...................................................Failed
- hook id: shellcheck
- exit code: 1

/home/bboczek/.cache/pre-commit/repoj3_8yr_y/hooks/shellcheck.sh: line 41: shellcheck: command not found

Expected behavior

• shellcheck should be installed automatically
• sudo apt install shellcheck command should be added to https://github.com/RobotecAI/rai/blob/main/docs/developer_guide.md

Screenshots

Platform

• OS: Ubuntu 22.04

Version
0b4b4ee

Additional context