feat: open dashbot on curl paste

[ShashwatXD]

PR Description

This PR implements the feature to open DashBot's import curl workflow when a user pastes a curl command in the URL text field.

Changes:

• When a curl command (starting with curl ) is pasted in the URL field, DashBot automatically opens in tab view mode
• DashBot navigates to the chat interface and activates the import curl workflow
• The curl command is automatically sent to DashBot for processing

Related Issues

• Closes Auto-parse curl command when pasted into URL field #953

Checklist

• I have gone through the contributing guide
• I have updated my branch and synced it with project main branch before making this PR
• I am using the latest Flutter stable branch (run flutter upgrade and verify)
• I have run the tests (flutter test) and all tests are passing

Added/updated tests?

We encourage you to add relevant test cases.

• Yes
• No, and this is why: This is a UI interaction feature that requires manual testing. The core functionality (curl parsing, DashBot workflow) already has existing tests.

OS on which you have developed and tested the feature?

• Windows
• macOS
• Linux