Add searchable instrument browser

Sources/MusicAssistantCore/Services/InstrumentCatalog/LocalInstrumentCatalog.swift

@@ -1,3 +1,5 @@
+import Foundation
+
 public struct LocalInstrumentCatalog: Sendable {
     public let items: [InstrumentCatalogItem]
 
@@ -5,6 +7,18 @@ public struct LocalInstrumentCatalog: Sendable {
         self.items = items
     }
 
+    public func instruments(matching query: String) -> [InstrumentCatalogItem] {
+        let searchTokens = Self.searchTokens(for: query)
+
+        return items
+            .filter { item in
+                searchTokens.isEmpty || searchTokens.allSatisfy { token in
+                    Self.searchableTerms(for: item).contains { $0.contains(token) }
+                }
+            }
+            .sorted { $0.name.localizedCaseInsensitiveCompare($1.name) == .orderedAscending }
+    }
+
     public static let worldwideItems: [InstrumentCatalogItem] =
         western + middleEastern + african + southAsian + eastAsian + southeastAsian + latinAmerican + folkAndModern
 
@@ -281,4 +295,23 @@ public struct LocalInstrumentCatalog: Sendable {
             searchTerms: terms
         )
     }
+
+    private static func searchableTerms(for item: InstrumentCatalogItem) -> [String] {
+        searchTokens(for: [item.name] + item.aliases + item.searchTerms)
+    }
+
+    private static func searchTokens(for query: String) -> [String] {
+        searchTokens(for: [query])
+    }
+
+    private static func searchTokens(for values: [String]) -> [String] {
+        values
+            .joined(separator: " ")
+            .folding(
+                options: [.caseInsensitive, .diacriticInsensitive, .widthInsensitive],
+                locale: Locale(identifier: "en_US_POSIX")
+            )
+            .split(whereSeparator: { $0.isWhitespace || $0 == "-" })
+            .map(String.init)
+    }
 }