Statistics page overhaul

[andreoda]

-> https://vocadb.net/stats

1. I would like to see the voicebank children included when calculating the usage of each voicebank in the VocaDB stats page. Currently, the statistics show ALL voicebanks as seen here:

• Example: Hatsune Miku V3 English, Hatsune Miku Append Dark -> Hatsune Miku (root voicebank + derived voicebanks)
• Another solution would be to make it optional, like making it possible to choose, if I want all voicebank counted together with their children or not.

2. A more detailed time filter. It only gives the options: Overall, Last day, Last two days etc.. I would like to be able to choose a more specific time. At least months, for example: "December 2020" -> Year and Month

3. A way to either mark and copy the name or making it possible to click on names to go to the VocaDB pages of that name

Related issue: https://github.com/VocaDB/vocadb/issues/1099

[saturclay]

1. Songs by producer only shows original songs, which is of limited use on TouhouDB--there should be an option to switch to other song types.
2. Songs by genre should have an option to include child tags.