feat: Move strings to resources for localization (#2440)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
Co-authored-by: semantic-release-bot <semantic-release-bot@martynus.net>
Co-authored-by: Aunali321 <aunvakil.aa@gmail.com>

BREAKING CHANGE: Various APIs have been changed.

src/main/kotlin/app/revanced/util/resource/StringResource.kt

@@ -0,0 +1,41 @@
+package app.revanced.util.resource
+
+import app.revanced.patcher.patch.PatchException
+import org.w3c.dom.Document
+import org.w3c.dom.Node
+
+/**
+ * A string value.
+ * Represents a string in the strings.xml file.
+ *
+ * @param name The name of the string.
+ * @param value The value of the string.
+ * @param formatted If the string is formatted. Defaults to `true`.
+ */
+class StringResource(
+    name: String,
+    val value: String,
+    val formatted: Boolean = true,
+) : BaseResource(name, "string") {
+    override fun serialize(ownerDocument: Document, resourceCallback: (BaseResource) -> Unit) =
+        super.serialize(ownerDocument, resourceCallback).apply {
+            // if the string is un-formatted, explicitly add the formatted attribute
+            if (!formatted) setAttribute("formatted", "false")
+
+            if (value.contains(Regex("(?<!\\\\)['\"]")))
+                throw PatchException("String $name cannot contain unescaped quotes in value \"$value\".")
+
+            textContent = value
+        }
+
+    companion object {
+        fun fromNode(node: Node): StringResource {
+            val name = node.attributes.getNamedItem("name").textContent
+            val value = node.textContent
+            // TODO: Should this be true by default? It is too in the constructor of StringResource.
+            val formatted = node.attributes.getNamedItem("formatted")?.textContent?.toBoolean() ?: true
+
+            return StringResource(name, value, formatted)
+        }
+    }
+}