fix: 2220 - web clipboard paste

[obv-andre]

Description

Describe what this PR does. If modifying behavior, explain the current and new behavior, along with the motivation.
Added back some of the logic from #2009, with modifications:

• Calls to preventDefault() in the stream callback to prevent double pasting
• Instead of calling pasteHtml directly, we call clipboardPaste to support falling-back to markdown
• Added an override in the controller config, fromHtml, in case of complex editor setups

Related Issues

Fix #2220

Type of Change

• ✨ Feature: New functionality without breaking existing features.
• 🛠️ Bug fix: Resolves an issue without altering current behavior.
• 🧹 Refactor: Code reorganization, no behavior change.
• ❌ Breaking: Alters existing functionality and requires updates.
• 🧪 Tests: New or modified tests
• 📝 Documentation: Updates or additions to documentation.
• 🗑️ Chore: Routine tasks, or maintenance.
• ✅ Build configuration change: Build/configuration changes.