[Feature] Add {last tag of head} decoration to Project view

[BenceSzalai]

Dear Łukasz, thank you for the great work you put into the plugin.

Here's my suggestion for you to consider please:

When working on multiple semvered packages (folders) in the same IDE instance it would be nice to see the last tagged version of a folder, even when there are additional commits since the last tagged commit. Currently the {tags on head} decorator only shows the last version tag if head points to the tagged commit. The {last tags of head} decorator would look at the head and behave the same as {tags on head} if head has a tag, but if head has no tags it would find the last tagged parent commit and show the tag found this way.

[zielu]

Hi, good idea. I'll add it to backlog.