Add feature to support 14 days and 1 year bans. fixes: #1527

[KonstantineVashalomidze]

fixes: #1527
New feature was added for admins. Admins can now also ban with durations 14 days or 1 year.

The following now looks like this:

Testing was done manually. I invited my friend into my test server and banned him for 14 days and 1 year. He was banned and then I have advanced system time further than 14 days and 1 year. Ban was revoked and after routine run he was unbanned.

15:35:28.878 [pool-4-thread-4] WARN  org.togetherjava.tjbot.features.help.HelpThreadActivityUpdater - Unable to update help thread activities, did not find a help forum matching the configured pattern 'questions' for guild 'Mama africa's server'
15:38:32.984 [ForkJoinPool.commonPool-worker-2] INFO  org.togetherjava.tjbot.features.moderation.BanCommand - 'kosta4115' (1021391825677860975) banned the user 'antiriad7' (488754445673431042) for 14 days from guild 'Mama africa's server' and deleted their message history of the last 0 days, for reason 'kkk'.
15:39:28.131 [ForkJoinPool.commonPool-worker-3] INFO  org.togetherjava.tjbot.features.moderation.temp.TemporaryModerationRoutine - Revoked temporary action BAN against user 'antiriad7' (488754445673431042).

Note that logs are within the same console since, I have just reloaded the project with Intellij devtools feature since I had problems with certificate when running app from scratch.

EDIT:
I have made changes as @Zabuzard and @Alathreon suggested. Since .plus(...) method doesn't support years, I had to convert number of years into number of days and use unit of DAYS to calculate ban period.

EDIT 2:
We have decided just to have 365 days option inserted instead of one 1 year.

[Zabuzard]

Looks liike the line is too loong or something. Can you run spotless quickly, thanks.

[KonstantineVashalomidze]

Looks liike the line is too loong or something. Can you run spotless quickly, thanks.

@Zabuzard Done. spotless check passes locally.