feat: add Keila (#757)

* Create keila.exs

* Update keila.exs

* Update keila.exs

Author: wmnnd

Diff for: priv/companies/keila.exs

@@ -0,0 +1,14 @@
+%{
+  industry: "Communication Services",
+  website: "https://www.keila.io/",
+  github: "https://github.com/pentacent/keila",
+  location: %{
+    country: "Germany"
+  },
+  name: "Keila",
+  last_changed_on: ~D[2025-04-08],
+  description: """
+  Keila is an Open Source email newsletter tool and an alternative to MailChimp. It’s available as a managed service (Keila Cloud) but can also be self-hosted.
+  Keila is built using the Phoenix framework and uses various common Elixir libraries, including Ecto, Oban, and Earmark.
+  """
+}