Draft: Servant Api Specification

This PR does 3 things:

1. Specifies a modular definition for the Skete Servant api, along with associated clients and server. The design is granular to facilitate better testing (standalone clients are easier to test when their component apis are separate from the rest of the API)

2. Restructures the project to define a toplevel RestAPI.hs module, with client/server/util definitions in an associated RestAPI/* namespace.

3. Adds the Servant-* dependencies, cleans up old code.

Addresses #21

cabal.project

@@ -29,7 +29,7 @@ source-repository-package
   type: git
   location: https://code.xkrd.net/skete/machines-bytestring.git
   tag: 4eb0751
-  
+
 source-repository-package
   type: git
   location: https://code.xkrd.net/distributed-systems/machines-seekable.git
@@ -68,20 +68,22 @@ source-repository-package
 allow-older:
   find:base
 
+-- breakage between cabal-install 3.2 and 3.4:
+-- the parser for 3.4 currently only recognizes comma-delineated
+-- allow-newer and allow-older clauses
 allow-newer:
-  assoc:base
-  cryptohash-sha1:base
-  find:base
-  list-tries:base
-  optparse-helper:base
-  semialign:base
-  text-show:base
-  template-haskell
-  these:base
-  unliftio-core:base
-  vault:base
+    assoc:base
+  , cryptohash-sha1:base
+  , find:base
+  , list-tries:base
+  , optparse-helper:base
+  , semialign:base
+  , text-show:base
+  , template-haskell
+  , these:base
+  , unliftio-core:base
+  , vault:base
 
 package skete-haskell
   test-show-details:streaming
   ghc-options: -Wall
-