Update sitemap generator to use the router

[caendesilva]

Refactors how the sitemap is generated, by utilizing the router. The actual XML result does not change.

[codecov]

Codecov Report

Merging #211 (57f0325) into master (33698a6) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##              master      #211   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
+ Complexity       809       804    -5     
===========================================
  Files            103       103           
  Lines           2075      2065   -10     
===========================================
- Hits            2075      2065   -10     

Impacted Files	Coverage Δ
packages/framework/src/Services/SitemapService.php	100.00% <100.00%> (ø)

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[caendesilva]

I notice it is much slower (relatively speaking). About 70ms instead of 5ms when running php hyde build:sitemap. But when using php hyde build it's around 7ms which is pretty much exactly the same as the old implementation. The reason for this is that Hyde needs to discover all the routes, which takes a bit. But it only needs to do to one per application lifecycle.