[editor] Fix minor issues in TextEditor extensions

- Give proper name
- Fix variable names
- Fix deprecated methods

projects/editor/src/app/text-editor/extensions/bullet-list.ts

@@ -11,6 +11,8 @@ declare module '@tiptap/core' {
 }
 
 export const BulletListExtension = BulletList.extend({
+  name: 'BulletListExtension',
+
   addAttributes() {
     return {
       listStyle: {

projects/editor/src/app/text-editor/extensions/font-size.ts

@@ -10,6 +10,8 @@ declare module '@tiptap/core' {
 }
 
 export const FontSizeExtension = TextStyle.extend({
+  name: 'FontSizeExtension',
+
   addAttributes() {
     return {
       fontSize: {

projects/editor/src/app/text-editor/extensions/hanging-indent.ts

@@ -13,8 +13,10 @@ declare module '@tiptap/core' {
 export const HangingIndent = Extension.create({
   name: 'hangingIndent',
 
-  defaultOptions: {
-    types: ['paragraph']
+  addOptions() {
+    return {
+      types: ['paragraph']
+    };
   },
 
   addGlobalAttributes() {

projects/editor/src/app/text-editor/extensions/indent.ts

@@ -19,10 +19,12 @@ declare module '@tiptap/core' {
 export const Indent = Extension.create<IndentOptions>({
   name: 'indent',
 
-  defaultOptions: {
-    types: ['listItem', 'paragraph'],
-    minLevel: 0,
-    maxLevel: 8
+  addOptions() {
+    return {
+      types: ['listItem', 'paragraph'],
+      minLevel: 0,
+      maxLevel: 8
+    };
   },
 
   addGlobalAttributes() {

projects/editor/src/app/text-editor/extensions/orderedList-extension.ts

@@ -11,6 +11,8 @@ declare module '@tiptap/core' {
 }
 
 export const OrderedListExtension = OrderedList.extend({
+  name: 'OrderedListExtension',
+
   addAttributes() {
     return {
       listStyle: {

projects/editor/src/app/text-editor/extensions/paragraph-extension.ts

@@ -10,7 +10,7 @@ declare module '@tiptap/core' {
   }
 }
 
-export const paragraphExtension = Paragraph.extend({
+export const ParagraphExtension = Paragraph.extend({
   addAttributes() {
     return {
       margin: {