refactor(streaming): convert to modules

Import methods rather than call via exports.

imports/requestStreamedTextureDict/client.lua

@@ -0,0 +1,31 @@
+---Load a texture dictionary. When called from a thread, it will yield until it has loaded.
+---@param textureDict string
+---@param timeout number? Number of ticks to wait for the dictionary to load. Default is 500.
+---@return string? textureDict
+function lib.requestStreamedTextureDict(textureDict, timeout)
+    if HasStreamedTextureDictLoaded(textureDict) then return textureDict end
+
+    if type(textureDict) ~= 'string' then
+        error(("expected textureDict to have type 'string' (received %s)"):format(type(textureDict)))
+    end
+
+    RequestStreamedTextureDict(textureDict)
+
+    if coroutine.running() then
+        timeout = tonumber(timeout) or 500
+
+        for _ = 1, timeout do
+            if HasStreamedTextureDictLoaded(textureDict) then
+                return textureDict
+            end
+
+            Wait(0)
+        end
+
+        print(("failed to load textureDict '%s' after %s ticks"):format(textureDict, timeout))
+    end
+
+    return textureDict
+end
+
+return lib.requestStreamedTextureDict