Goal:
Add template formatting functions

Dependencies
T347870
T344508
T347925

Requirements:

• Add template formatting formatting button
• Add button selection states
• Add formatter inserts / deletions for linking
• Add syntax highlighting for templates.
• Add formatters to toolbar for double tap on text.
• Confirm RTL support

Mocks
Figma

Testing Notes
Please test template syntax highlighting and template button function in native editor.

Engineering note
Old prototype work here should be in app > native-editor-prototype branch