* web: parameterize generateSite, remove Embedded from library
Move embedFile/embedDir out of the library so it works when
simplexmq is consumed as a dependency. generateSite now accepts
mediaContent, wellKnown, and linkHtml as parameters.
* smp-server, xftp-server: embed static files in executables
Add shared apps/common/Embedded.hs with TH splices, update SMPWeb
and XFTPWeb to pass embedded content to generateSite, move
file-embed dependency from library to executables and test suite.
* refactor
* add export, move common files to Web subfolder
* fix .cabal
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Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>
