system: update doc commands and remove mutex

The mutex is not really doing anything, none of these methods make sense when called concurrently anyway. The copylocks analysis is still satisfied by the noCopy struct.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/app/export_test.go

@@ -1,17 +1,16 @@
 package app
 
 import (
+	"context"
+
 	"hakurei.app/container"
 	"hakurei.app/internal/app/state"
 	"hakurei.app/internal/sys"
 	"hakurei.app/system"
 )
 
-func NewWithID(id state.ID, os sys.State) *App {
-	a := new(App)
-	a.id = newID(&id)
-	a.sys = os
-	return a
+func NewWithID(ctx context.Context, id state.ID, os sys.State) *App {
+	return &App{id: newID(&id), sys: os, ctx: ctx}
 }
 
 func AppIParams(a *App, seal *Outcome) (*system.I, *container.Params) {