Initial implementation of HTML report from journal

[spirali]

This PR adds hq journal report <journal> <output-filename> that exports journal statistics as follows:

• This implementation now takes the journal file as the input. In the case of need it is possible to create a report from a live server or JSON export.
• This version is not rebased on the newest main, because Waiting mechanism refactor + user notification mechanism. #1024 adds new events and v0.23.0-v0.24.0 journal would be not loadable. I am leaving it as it is for now so potential testers may use their current journals. (btw: It it non conflicting with the current main)
• I have just implemented basic charts and basic time filtering. There are a lots of option what to implement but I would let it be user use-case driven.
• Known bug: It does not work when resource variants are used (needs to update journal to implement this; it will be in the next PR).

[Kobzol]

This version is not rebased on the newest main

CI will always rebase on main, so you won't be able to share the CI artifacts with the main that this PR is based on.

[spirali]

This version is not rebased on the newest main

CI will always rebase on main, so you won't be able to share the CI artifacts with the main that this PR is based on.

Ah, ok. So in that case, an enthusiastic tester may build own HQ version:)

I will leave it here for few days, meanwhile I will independently fix the problem with resource variants (that also breaks the journal compatibility) and then rebase this.

[spirali]

Rebased on main + fixed variant bugs.