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/Extensions/StringBuilderExtensions.cs

@@ -0,0 +1,62 @@
+using System.Text;
+
+namespace TeamOctolings.Octobot.Extensions;
+
+public static class StringBuilderExtensions
+{
+    /// <summary>
+    ///     Appends the input string with Markdown Bullet formatting to the specified <see cref="StringBuilder" /> object.
+    /// </summary>
+    /// <param name="builder">The <see cref="StringBuilder" /> object.</param>
+    /// <param name="value">The string to append with bullet point.</param>
+    /// <returns>
+    ///     The builder with the appended string with Markdown Bullet formatting.
+    /// </returns>
+    public static StringBuilder AppendBulletPoint(this StringBuilder builder, string? value)
+    {
+        return builder.Append("- ").Append(value);
+    }
+
+    /// <summary>
+    ///     Appends the input string with Markdown Sub-Bullet formatting to the specified <see cref="StringBuilder" /> object.
+    /// </summary>
+    /// <param name="builder">The <see cref="StringBuilder" /> object.</param>
+    /// <param name="value">The string to append with sub-bullet point.</param>
+    /// <returns>
+    ///     The builder with the appended string with Markdown Sub-Bullet formatting.
+    /// </returns>
+    public static StringBuilder AppendSubBulletPoint(this StringBuilder builder, string? value)
+    {
+        return builder.Append(" - ").Append(value);
+    }
+
+    /// <summary>
+    ///     Appends the input string with Markdown Bullet formatting followed by
+    ///     the default line terminator to the end of specified <see cref="StringBuilder" /> object.
+    /// </summary>
+    /// <param name="builder">The <see cref="StringBuilder" /> object.</param>
+    /// <param name="value">The string to append with bullet point.</param>
+    /// <returns>
+    ///     The builder with the appended string with Markdown Bullet formatting
+    ///     and default line terminator at the end.
+    /// </returns>
+    public static StringBuilder AppendBulletPointLine(this StringBuilder builder, string? value)
+    {
+        return builder.Append("- ").AppendLine(value);
+    }
+
+    /// <summary>
+    ///     Appends the input string with Markdown Sub-Bullet formatting followed by
+    ///     the default line terminator to the end of specified <see cref="StringBuilder" /> object.
+    /// </summary>
+    /// <param name="builder">The <see cref="StringBuilder" /> object.</param>
+    /// <param name="value">The string to append with sub-bullet point.</param>
+    /// <returns>
+    ///     The builder with the appended string with Markdown Sub-Bullet formatting
+    ///     and default line terminator at the end.
+    /// </returns>
+    public static StringBuilder AppendSubBulletPointLine(this StringBuilder builder, string? value)
+    {
+        return builder.Append(" - ").AppendLine(value);
+    }
+}