[overleaf-editor-core] Restructure TextOperation hierachy (#16582)

* [overleaf-editor-core] Restructure TextOperation hierachy

Restructures the hierachy of TextOperations to include a superclass
EditOperation. This superclass will later on contain other classes used
for tracked changes and comments.

* [overleaf-editor-core] Update json format of LazyStringFileData

* [history-v1+project-history] Fix TextOperation.fromJSON calls

* [overleaf-editor-core] Change EditOperationBuilder.fromRaw to fromJSON

* [overleaf-editor-core] Update apply and invert functions to accept FileData

* [overleaf-editor-core] Pass missing argument to store method

* [overleaf-editor-core] Remove unused method

* [overleaf-editor-core] User EditOperationTransformer

* [overleaf-editor-core] Clean up JSDoc comments

* [overleaf-editor-core] Add tests for EditOperation

* [overleaf-editor-core] Update JSDoc types

GitOrigin-RevId: 9c22a3a89b8483bdb87b43f329ddbdd887ffed42

libraries/overleaf-editor-core/test/support/random_text_operation.js

@@ -0,0 +1,31 @@
+const TextOperation = require('../../lib/operation/text_operation')
+const random = require('./random')
+
+/**
+ *
+ * @param {string} str
+ * @returns {TextOperation}
+ */
+function randomTextOperation(str) {
+  const operation = new TextOperation()
+  let left
+  while (true) {
+    left = str.length - operation.baseLength
+    if (left === 0) break
+    const r = Math.random()
+    const l = 1 + random.int(Math.min(left - 1, 20))
+    if (r < 0.2) {
+      operation.insert(random.string(l))
+    } else if (r < 0.4) {
+      operation.remove(l)
+    } else {
+      operation.retain(l)
+    }
+  }
+  if (Math.random() < 0.3) {
+    operation.insert(1 + random.string(10))
+  }
+  return operation
+}
+
+module.exports = randomTextOperation