Apply official naming guidelines to Octobot (#306)

1. The root namespace was changed from `Octobot` to
`TeamOctolings.Octobot`:
> DO prefix namespace names with a company name to prevent namespaces
from different companies from having the same name.
2. `Octobot.cs` was renamed to `Program.cs`:
> DO NOT use the same name for a namespace and a type in that namespace.
3. `IOption`, `Option` were renamed to `IGuildOption` and `GuildOption`
respectively:
> DO NOT introduce generic type names such as Element, Node, Log, and
Message.
4. `Utility` was moved out of the `Services` namespace. It didn't belong
there anyway
5. `Program` static fields were moved to `Utility`
6. Localisation files were moved back to the project source files. Looks
like this fixed `Message.Designer.cs` code generation

---------

Signed-off-by: Octol1ttle <l1ttleofficial@outlook.com>

TeamOctolings.Octobot/Data/Options/IGuildOption.cs

@@ -0,0 +1,12 @@
+using System.Text.Json.Nodes;
+using Remora.Results;
+
+namespace TeamOctolings.Octobot.Data.Options;
+
+public interface IGuildOption
+{
+    string Name { get; }
+    string Display(JsonNode settings);
+    Result Set(JsonNode settings, string from);
+    Result Reset(JsonNode settings);
+}