chore: Move httpapi, httpmw, & database into coderd

[Emyrk]

The goal is to keep all Coder specific packages in coderd. This draws some better boundaries on what these 3 packages can import themselves.

• chore: Move httpmw to /coderd directory
• chore: Move httpapi to /coderd directory
• chore: Move database to /coderd directory

[kylecarbs]

We can take out (cdr) from the title, because there's only cdr now! Let's list the specific packages in the title too for easy historical records!

[Emyrk]

@kylecarbs makes sense. Habit from /m. Will defer semantic commit discussion for now. I still find value in tags, but agree the tag I put was redundant.

[codecov]

Codecov Report

Merging #568 (457b21a) into main (6be949a) will increase coverage by 0.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #568      +/-   ##
==========================================
+ Coverage   63.55%   63.66%   +0.11%     
==========================================
  Files         195      195              
  Lines       11205    11205              
  Branches       85       85              
==========================================
+ Hits         7121     7134      +13     
+ Misses       3326     3317       -9     
+ Partials      758      754       -4     

Flag	Coverage Δ
unittest-go-	62.57% <ø> (+0.29%)	⬆️
unittest-go-macos-latest	58.21% <ø> (+0.14%)	⬆️
unittest-go-ubuntu-latest	61.26% <ø> (+0.02%)	⬆️
unittest-go-windows-2022	57.10% <ø> (+<0.01%)	⬆️
unittest-js	63.32% <ø> (ø)

Impacted Files	Coverage Δ
cli/cliui/job.go	66.66% <ø> (ø)
cli/parametercreate.go	30.35% <ø> (ø)
cli/projectcreate.go	48.71% <ø> (+1.92%)	⬆️
cli/projects.go	54.23% <ø> (ø)
cli/projectupdate.go	7.24% <ø> (ø)
cli/ssh.go	5.12% <ø> (ø)
cli/start.go	65.84% <ø> (ø)
cli/workspacecreate.go	35.15% <ø> (ø)
cli/workspacedelete.go	17.14% <ø> (ø)
cli/workspacestart.go	14.70% <ø> (ø)
... and 51 more

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[kylecarbs]

One extremely minor comment. Woooonderful cleanup of the structure!