Integrated Analytics into the Infrastructure package (#40)

This PR contains the work done to define the `Analytics` type into the _Infrastructure_ package and also, to integrate this type into its `Page` protocol.

Reviewed-on: rock-n-code/loud-amsterdam#40
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>

Packages/Infrastructure/Tests/Cases/Public/Protocols/PageTests.swift

@@ -122,6 +122,40 @@ struct PageTests {
         ))
     }
 
+    @Test
+    func `omits the analytics tracker by default`() {
+        let html = StubPage().render()
+
+        #expect(!html.contains("data-website-id"))
+    }
+
+    @Test
+    func `renders the analytics tracker when provided`() {
+        let html = StubPage(analytics: .init(
+            scriptURL: "https://analytics.example.com/script",
+            websiteID: "0000-website-id",
+            domains: "example.com"
+        )).render()
+
+        #expect(html.contains(#"<script defer src="https://analytics.example.com/script" data-website-id="0000-website-id" data-domains="example.com" data-exclude-hash="true" data-do-not-track="true" data-performance="true"></script>"#))
+    }
+
+    @Test
+    func `omits the analytics behavior flags that are disabled`() {
+        let html = StubPage(analytics: .init(
+            scriptURL: "https://analytics.example.com/script",
+            websiteID: "0000-website-id",
+            domains: "example.com",
+            excludeHash: true,
+            doNotTrack: false,
+            performance: false
+        )).render()
+
+        #expect(html.contains(#"<script defer src="https://analytics.example.com/script" data-website-id="0000-website-id" data-domains="example.com" data-exclude-hash="true"></script>"#))
+        #expect(!html.contains("data-do-not-track"))
+        #expect(!html.contains("data-performance"))
+    }
+
     @Test
     func `appends the version token to the asset URLs`() {
         let html = StubPage(assetVersion: "0123456789abcdef").render()