♻️ WIP: Refactor determining PHP configuration

The way .ini files are loaded is changing with this commit. Instead of
directly saving which extensions were found, the extensions loaded are
now determined by reading the .ini file.

However, there are some performance concerns here. Perhaps it is worth
*not* reloading the contents of these files unless absolutely necessary.

phpmon-tests/Parsers/PhpIniTest.swift

@@ -0,0 +1,23 @@
+//
+//  PhpIniTest.swift
+//  PHP Monitor
+//
+//  Created by Nico Verbruggen on 04/05/2022.
+//  Copyright © 2022 Nico Verbruggen. All rights reserved.
+//
+
+import XCTest
+
+class PhpIniTest: XCTestCase {
+
+    static var phpIniFileUrl: URL {
+        return Bundle(for: Self.self).url(forResource: "php", withExtension: "ini")!
+    }
+
+    func testCanLoadExtension() throws {
+        let iniFile = PhpInitializationFile(fileUrl: Self.phpIniFileUrl)
+
+        XCTAssertNotNil(iniFile)
+    }
+
+}