fix: json template render bad empty array and empty object

[ifplusor]

What problem does this PR solve?

JSON template renders bad empty array and empty object

Problem Summary

• missing '[' when renders empty array
• missing '{' when renders empty object

What has changed and how does it work?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

[codecov]

Codecov Report

Merging #644 (b8dfc8d) into main (ee76217) will decrease coverage by 5.74%.
Report is 106 commits behind head on main.
The diff coverage is 3.63%.

@@            Coverage Diff             @@
##             main     #644      +/-   ##
==========================================
- Coverage   57.07%   51.33%   -5.74%     
==========================================
  Files         190      260      +70     
  Lines       15191    19566    +4375     
==========================================
+ Hits         8670    10045    +1375     
- Misses       5884     8703    +2819     
- Partials      637      818     +181     

Flag	Coverage Δ
unittests	51.33% <3.63%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
api/errors/app.go	30.90% <ø> (ø)
lib/bytes/clone_go119.go	0.00% <ø> (ø)
lib/bytes/escape.go	54.46% <ø> (ø)
lib/bytes/io.go	0.00% <ø> (ø)
lib/bytes/parse.go	7.14% <ø> (ø)
lib/bytes/unsafe.go	100.00% <ø> (ø)
lib/bytes/utf8.go	11.11% <ø> (ø)
lib/json/path/parse.go	49.41% <ø> (ø)
lib/json/path/path.go	0.00% <ø> (ø)
lib/json/path/segment.go	0.00% <ø> (ø)
... and 31 more

... and 393 files with indirect coverage changes

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[xdlbdy]

LGTM