[ISSUE] ddcutil: udev rule

[dkwo <dkwo@users.noreply.github.com>]

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New issue by dkwo on void-packages repository

https://github.com/void-linux/void-packages/issues/29152

Description:
With `kernel 5.11` and `ddcutil 1.0.1` it's now possible to control external display connected via docking station.
When running `ddcutil`, at the moment it is necessary to use `sudo/doas`, as no rules are in place.
In fact, `ddctutil environment` suggests:
```
Configuration suggestions:
   Issue:
      Group i2c does not exist.
   Suggestion:
      Create group i2c. To create group i2c, use command:
         sudo groupadd --system i2c
      Assign /dev/i2c-N devices to group i2c by adding a rule to /etc/udev/rules.d
      Add the current user to group i2c:
         sudo usermod -G i2c -a <username>
      After this, you will have to logout and login again.
      The changes to the user's group list are not read until a new login.
```
Is it fine to ship a new `udev` rule with `ddcutil`, something like the suggested
```
$ cat /usr/share/ddcutil/data/45-ddcutil-i2c.rules
# On some distributions, package i2c-tools provides a udev rule.
# For example, on Ubuntu, see 40-i2c-tools.rules.

# Assigns the i2c devices to group i2c, and gives that group RW access:
KERNEL=="i2c-[0-9]*", GROUP="i2c", MODE="0660"

# Gives everyone RW access to the /dev/i2c devices:
# KERNEL=="i2c-[0-9]*",  MODE="0666"
```
Or what is the correct approach?