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>

Services/Website/Sources/Library/Public/Contexts/WebsiteRequestContext.swift

@@ -1,26 +1,13 @@
 import Hummingbird
-
-/// A request context that carries the language negotiated for the request.
-///
-/// ``LocalizationMiddleware`` resolves the visitor's preferred language from the `Accept-Language`
-/// header and stores it here, so downstream controllers and middleware can serve the matching
-/// localization without re-reading the header.
-public protocol LocalizedRequestContext: RequestContext {
-
-    // MARK: Properties
-
-    /// The language identifier negotiated for the request.
-    var language: String { get set }
-
-}
-
-// MARK: - Context
+import Infrastructure
+import NIOCore
 
 /// The website's request context.
 ///
 /// Extends the core request storage with the negotiated language, defaulting to the default
-/// supported language until ``LocalizationMiddleware`` resolves it from the request.
-public struct WebsiteRequestContext: LocalizedRequestContext {
+/// supported language until ``LocalizationMiddleware`` resolves it from the request, and with
+/// the connected client's address, so ``RateLimitMiddleware`` can key its budgets per client.
+public struct WebsiteRequestContext: LocalizedRequestContext, RemoteAddressRequestContext {
 
     // MARK: Properties
 
@@ -28,6 +15,8 @@ public struct WebsiteRequestContext: LocalizedRequestContext {
     public var coreContext: CoreRequestContextStorage
     /// The language identifier negotiated for the request.
     public var language: String
+    /// The address of the connected client, captured from the source channel.
+    public let remoteAddress: SocketAddress?
 
     // MARK: Initializers
 
@@ -38,6 +27,7 @@ public struct WebsiteRequestContext: LocalizedRequestContext {
     ) {
         self.coreContext = .init(source: source)
         self.language = .empty
+        self.remoteAddress = source.channel.remoteAddress
     }
 
 }