Start generating parse methods (#4)

Co-authored-by: Smaug123 <patrick+github@patrickstevens.co.uk>
Reviewed-on: #4

PureGym/Client.fs

@@ -0,0 +1,39 @@
+namespace PureGym
+
+open System
+open System.Net.Http
+open System.Threading
+open System.Threading.Tasks
+open RestEase
+
+/// The PureGym REST API. You probably want to instantiate one of these with `Api.make`.
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<Header("User-Agent", "PureGym/1523 CFNetwork/1312 Darwin/21.0.0")>]
+type IPureGymApi =
+    /// Get the complete list of all gyms known to PureGym.
+    [<Get "v1/gyms/">]
+    abstract GetGyms : ?ct : CancellationToken -> Task<Gym list>
+
+    /// Get information about the PureGym human whose credentials this client is authenticated with.
+    [<Get "v1/member">]
+    abstract GetMember : ?ct : CancellationToken -> Task<Member>
+
+    /// Get information about how full the given gym currently is. The gym ID can be found from `GetGyms`.
+    [<Get "v1/gyms/{gym_id}/attendance">]
+    abstract GetGymAttendance : [<Path "gym_id">] gymId : int * ?ct : CancellationToken -> Task<GymAttendance>
+
+    /// Get information about a specific gym.
+    [<Get "v1/gyms/{gym_id}">]
+    abstract GetGym : [<Path "gym_id">] gymId : int * ?ct : CancellationToken -> Task<Gym>
+
+    /// Get information about the activities logged against the currently authenticated PureGym human.
+    [<Get "v1/member/activity">]
+    abstract GetMemberActivity : ?ct : CancellationToken -> Task<MemberActivityDto>
+
+    /// Get information about the individual visits to all PureGyms the currently-authenticated PureGym human has made.
+    [<Get "v2/gymSessions/member">]
+    abstract GetSessions :
+        [<Query>] fromDate : DateOnly * [<Query>] toDate : DateOnly * ?ct : CancellationToken -> Task<Sessions>
+
+// [<Get "v1/member/activity/history">]
+// abstract GetMemberActivityAll : ?ct: CancellationToken -> Task<string>