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/Internal/Enumerations/StaticFile.swift

@@ -1,9 +1,11 @@
+import Infrastructure
+
 /// A static file shipped with the website service.
 ///
 /// Each case identifies a file name stored under the static files root (the `Resources/Static`
 /// directory) and served by Hummingbird's `FileMiddleware` middleware. A name can be available
 /// with more than one extension (see ``fileExtensions``), each resolving to its own file.
-enum StaticFile: CaseIterable, Sendable {
+enum StaticFile: Asset, CaseIterable {
     /// The `apple-touch-icon.png` icon.
     case appleTouchIcon
     /// The `css/error.css` stylesheet and `js/error.js` script for the not-found page.
@@ -28,30 +30,6 @@ enum StaticFile: CaseIterable, Sendable {
     case sitemap
 }
 
-// MARK: - Enumerations
-
-extension StaticFile {
-    /// A file extension used by a ``StaticFile``.
-    enum Extension: String, Sendable {
-        /// A Cascading Style Sheets file.
-        case css
-        /// A JavaScript file.
-        case js
-        /// A Portable Network Graphics image.
-        case png
-        /// A Windows icon image.
-        case ico
-        /// A Scalable Vector Graphics image.
-        case svg
-        /// A plain text file.
-        case txt
-        /// A web application manifest file.
-        case webmanifest
-        /// An Extensible Markup Language file.
-        case xml
-    }
-}
-
 // MARK: - Extensions
 
 extension StaticFile {
@@ -59,7 +37,7 @@ extension StaticFile {
     // MARK: Computed
     
     /// The file extensions the file is available with.
-    var fileExtensions: [Extension] {
+    var fileExtensions: [AssetExtension] {
         switch self {
         case .appleTouchIcon,
              .icon192,
@@ -92,79 +70,4 @@ extension StaticFile {
         }
     }
 
-    // MARK: Methods
-
-    /// Resolves the file's path against the given base directory.
-    ///
-    /// - Parameters:
-    ///   - basePath: the directory the static files are served from.
-    ///   - fileExtension: the extension of the file to resolve.
-    /// - Returns: the path to the file, relative to the `basePath` path.
-    func path(
-        relativeTo basePath: String,
-        for fileExtension: Extension
-    ) -> String {
-        let relativePath = relativePath(for: fileExtension)
-
-        guard !basePath.isEmpty else {
-            return relativePath
-        }
-
-        return "\(basePath)/\(relativePath)"
-    }
-    
-    /// Resolves the file's path relative to the static files root (e.g. `"css/shared.css"`).
-    ///
-    /// This also matches the URL path the file is served at by `FileMiddleware`.
-    ///
-    /// - Parameter fileExtension: the extension of the file to resolve.
-    /// - Returns: the path to the file, relative to the static files root.
-    func relativePath(
-        for fileExtension: Extension
-    ) -> String {
-        let file = "\(fileName).\(fileExtension.rawValue)"
-
-        return fileExtension.subdirectory
-            .map { "\($0)/\(file)" } ?? file
-    }
-
-    /// Resolves the absolute URL path the file is served at (e.g. `"/css/shared.css"`).
-    ///
-    /// - Parameter fileExtension: the extension of the file to resolve.
-    /// - Returns: the path to use in `href` and `src` attributes.
-    func urlPath(
-        for fileExtension: Extension
-    ) -> String {
-        "/\(relativePath(for: fileExtension))"
-    }
-
-}
-
-extension StaticFile.Extension {
-    
-    // MARK: Computed
-
-    /// The file's content type.
-    var contentType: String {
-        switch self {
-        case .css: "text/css"
-        case .js: "text/javascript"
-        case .png: "image/png"
-        case .ico: "image/vnd.microsoft.icon"
-        case .svg: "image/svg+xml"
-        case .txt: "text/plain"
-        case .webmanifest: "application/manifest+json"
-        case .xml: "application/xml"
-        }
-    }
-
-    /// The sub-directory within the static root that holds files with this extension, if any.
-    var subdirectory: String? {
-        switch self {
-        case .css: "css"
-        case .js: "js"
-        default: nil
-        }
-    }
-
 }