feat(DX): sourceURL for injected javascript
feat(DX): sourceURL for injected javascript

Adds sourceURL to injected javascript code, this helps in debugging
injected javascript using client script or doctype specific javascript.

`no-docs`

(cherry picked from commit 8dd925743c59f735567d7f73395648e7c4fbb742)

mhbu50/frappe,mhbu50/frappe,saurabh6790/frappe,frappe/frappe,yashodhank/frappe,almeidapaulopt/frappe,frappe/frappe,StrellaGroup/frappe,frappe/frappe,saurabh6790/frappe,saurabh6790/frappe,yashodhank/frappe,StrellaGroup/frappe,yashodhank/frappe,saurabh6790/frappe,StrellaGroup/frappe,mhbu50/frappe,almeidapaulopt/frappe,mhbu50/frappe,almeidapaulopt/frappe,yashodhank/frappe,almeidapaulopt/frappe