perf: send boot string instead of JSON literal

changes:

- compact boot info in /app HTML
    /app size went from 451kb to 393kb - ~13% less
    Verified that regex applied on this JSON aren't affecting perf, infact
    found them to be faster with compact JSON.

- Send json string instead of placing JSON literal in code using Jinja.
  JS takes more time to pass object literal than parsing a plain JSON string.

Overall content transfer size remains roughly same (albeit slightly
lower) since double escaping ends up adding extra `\` around quotes.

Co-authored-by: Suraj Shetty <surajshetty3416@gmail.com>

frappe/www/app.html

@@ -42,7 +42,7 @@
 
 			if (!window.frappe) window.frappe = {};
 
-			frappe.boot = {{ boot }};
+			frappe.boot = JSON.parse({{ boot }});
 			frappe._messages = frappe.boot["__messages"];
 			frappe.csrf_token = "{{ csrf_token }}";
 		</script>

frappe/www/app.py

@@ -2,6 +2,7 @@
 # License: MIT. See LICENSE
 no_cache = 1
 
+import json
 import os
 import re
 
@@ -32,13 +33,14 @@ def get_context(context):
 
 	frappe.db.commit()
 
-	boot_json = frappe.as_json(boot)
+	boot_json = frappe.as_json(boot, indent=None, separators=(",", ":"))
 
 	# remove script tags from boot
 	boot_json = SCRIPT_TAG_PATTERN.sub("", boot_json)
 
 	# TODO: Find better fix
 	boot_json = CLOSING_SCRIPT_TAG_PATTERN.sub("", boot_json)
+	boot_json = json.dumps(boot_json)
 
 	context.update(
 		{