Update libraries pages to use path based version to match the releases page

[daveoconnor]

This ticket is from a discussion with @vinniefalco who was asking why the URL structures are different, why there's a query param in there instead of it being part of the URL. This is something that bugged me too when working on it, we can simplify the views and the shared code by unifying it to all being path based.

e.g.
/libraries/release/grid
/libraries/release/mini
/libraries/1.80.1/mini
/libraries/release/algorithm

[daveoconnor]

Considerations would be:

1. Any changes needed to have redirects for urls that are intended to match the old ones.
2. Caching changes
3. Possible removal of the cookie or a switch to session variable, multi-user use

[sdarwin]

session variable

@daveoconnor the current cookie strategy include library_view and boost_version. This is working. It was after having sessions variables, and then removing session variables. which are not cdn-cachable. At least from the description of this issue 1360, the cookies can still be used.

[daveoconnor]

Thanks @sdarwin ,yeah, that's all working fine, and I don't think it necessarily needs to change, it was just something that came up in the discussion at the time because having to account for the cookie (or session variable has the same issue) is a cause of some of the edge case urls Vinnie wasn't liking and should be noted. Shouldn't be an issue if we switch to the new urls above.

[daveoconnor]

@vinniefalco has a wider ranging suggestion here which I like

#1365 (comment)

https://boost.org/v/1.86.0/lib/doc/mp11
https://boost.org/v/1.86.0/lib/doc/url
https://boost.org/v/1.86.0/release-notes