Goal:
Add paragraph/header formatting functions to NativeEditor toolbar

Dependencies
T347870
T344508
T347925

Requirements:

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

Mocks
Figma

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

Notes for QA

Please test heading syntax highlighting and buttons in native editor.