Add fail2ban package
This should also provide some integration for foris, luci and ssh.
Example https://github.com/peci1/fail2ban_openwrt
This should help meet the following mandatory requirements for Tier 1 defined by CSA Singapore's Cybersecurity Labeling Scheme
- 5.1-5:When the device is not a constrained device, it shall have a mechanism available which makes bruteforce attacks on authentication mechanisms via network interfaces impracticable.
Related to https://gitlab.nic.cz/turris/biz/singapore-certification/-/issues/1