Add missing license headers

+4
Sources/PterodactylLanguageServer/AbsolutePath+URI.swift
···
+
// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
+
//
+
// SPDX-License-Identifier: MPL-2.0
+
import Foundation
import TSCBasic
import LanguageServerProtocol
+4
Sources/PterodactylLanguageServer/LLBDeclFileTree+Singleton.swift
···
+
// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
+
//
+
// SPDX-License-Identifier: MPL-2.0
+
import Foundation
import TSCBasic
import llbuild2fx
+4
Sources/PterodactylLanguageServer/Logger.swift
···
+
// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
+
//
+
// SPDX-License-Identifier: MPL-2.0
+
import Foundation
import Logging
+4
Sources/PterodactylLanguageServer/SourceTreeManager.swift
···
+
// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
+
//
+
// SPDX-License-Identifier: MPL-2.0
+
import LanguageServerProtocol
import PterodactylBuild
import TSCBasic