Renamed the Web package as Infrastructure (#25)

This PR contains the work done to rename the _Web_ package as _Infrastructure_, to provide a clear naming and purpose to this particular package within the project.

To provide further details about the work:

* Infrastructure
  * Asset fingerprinting: an FNV-1a token derived from the static files directory, appended as ?v= to asset URLs so deploys bust caches; pre-rendered pages also revalidate via weak ETags.
  * New middlewares: fixed-window RateLimitMiddleware (per-client budgets keyed by trusted X-Forwarded-For or remote address) and VaryMiddleware (Accept-Encoding on every response); SecurityHeadersMiddleware now also stamps error responses.
  * Auto-generated HEAD endpoints, cache max-age configuration, and Docker build/Compose refinements.
  * Protocols and scaffolding: Asset/AssetExtension, the Page protocol (viewport, stylesheets, scripts, versioned URLs), and LocalizedRequestContext.
  * Rate limiter's counter store swapped from an actor to a Mutex (no executor hop per request) with amortized batch eviction instead of O(n²) scans under client floods.
  * FingerprintAssets reports unreadable files to a logger instead of silently producing a token that never busts their cache.

Reviewed-on: rock-n-code/loud-amsterdam#25
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

Packages/Infrastructure/Tests/Catalogs/Localizable.xcstrings

@@ -0,0 +1,23 @@
+{
+  "sourceLanguage" : "en",
+  "strings" : {
+    "test.greeting" : {
+      "comment" : "Fixture string used by the Infrastructure test suite.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Hallo"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "translated",
+            "value" : "Hello"
+          }
+        }
+      }
+    }
+  },
+  "version" : "1.0"
+}