feat: Support add route for application

Created by: leoendless

Signed-off-by: leoliu leoliu@yunify.com

What type of PR is this?

/kind feature

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #1426 (closed) #1427 (closed)

Special notes for reviewers:

Additional documentation, usage docs, etc.: