Update dependabot package-ecosystems; set schedule to daily (#2360)

- Update dependabot dependency check to `daily`; it's our only supply
chain scanner at the moment
- Configure dependabot to alert on security issues
- Fix some directory path configurations
- Remove ruby
- Add Swift
- Use `gradle`, not `maven` ecosystem
- Add @firezone/engineering to code scanning / security alerting
management
- Remove Ruby and add Java/Kotlin and Swift to CodeQL

<img width="801" alt="Screenshot 2023-10-16 at 5 02 48 PM"
src="https://github.com/firezone/firezone/assets/167144/c2b11580-f819-4b9c-b28e-c20d9f24c93e">


Fixes #1687

.github/dependabot.yml

@@ -5,26 +5,22 @@
 
 version: 2
 updates:
-  - package-ecosystem: "mix" # See documentation for possible values
-    directory: "/" # Location of package manifests
+  - package-ecosystem: "mix"
+    directory: "elixir/"
     schedule:
-      interval: "weekly"
+      interval: "daily"
   - package-ecosystem: "pip"
     directory: "/"
     schedule:
-      interval: "weekly"
+      interval: "daily"
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "weekly"
-  - package-ecosystem: "bundler"
-    directory: "/"
-    schedule:
-      interval: "weekly"
+      interval: "daily"
   - package-ecosystem: "cargo"
     directory: "rust/"
     schedule:
-      interval: "weekly"
+      interval: "daily"
     groups:
       otel:
         patterns:
@@ -35,12 +31,23 @@ updates:
           - "tracing-stackdriver"
         update-types:
           - "minor"
-  - package-ecosystem: "maven"
-    directory: "rust/connlib/clients/android"
+  - package-ecosystem: "gradle"
+    directory: "rust/connlib/clients/android/connlib/"
     schedule:
-      interval: "weekly"
-  - package-ecosystem: "maven"
-    directory: "kotlin/"
+      interval: "daily"
+  - package-ecosystem: "gradle"
+    directory: "kotlin/android/"
     schedule:
-      interval: "weekly"
-  # TODO: Apple package ecosystem
+      interval: "daily"
+  - package-ecosystem: "swift"
+    directory: "swift/apple/FirezoneKit/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "npm"
+    directory: "website/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "npm"
+    directory: "elixir/apps/web/assets/"
+    schedule:
+      interval: "daily"