Overhaul tidyverse blogdown setup

[batpigandme]

Catch-all tracking for @batpigandme and @apreshill, to be meted out into individual issues as necessary.

• Page bundling Implement page bundles #279
• Hugo params Update Hugo params per warning #305
• Switch from "Articles" to "Blog" Switch "Articles" to "Blog" #340
• [X ] Add search Site needs search #208
• Add tags Add article tags #185

[apreshill]

Hopefully it's ok if I start adding here too- some issues I noted as relevant to either the Hugo layouts in the base theme itself or to the CSS:

• Fix hex logos on index page Update hex logos image on homepage #212 / Add 1.2.0 core hex badges (stringr & forcats) to main page? #95

• Display author inside actual blog post Should article author display in article itself? #65

• Fix size of code within markdown headers (mentioned in line height of code blocks #260)

• Fix vertical padding on code Too much vertical padding on code #309

• Make sure table styling is consistent with table styling with raw knitr::kable() tables #307

[batpigandme]

@apreshill, absolutely! That's why it's here! 😄

[batpigandme]

Linking to the rest of outstanding issues here
https://github.com/batpigandme/tidyverse.org/issues

[hadley]

Closing since these are all down (apart from 185), which we can track separately.