## Description
This PR contains some UI changes for code in Appsmith.
- Sets font-family as ui-monospace for text in code editors and JSON
viewer (used in evaluated value popup and debugger).
- Sets font-size of text in code editors to 13px.
- Set font-size for text in autocomplete to 11px.
- Added line highlight to indicate the active line. This will be the
focus state of JS Editor going forward.
- Removed border-bottom for Tabs in JS Editor to keep it consistent with
rest of the pages.
- Introduces new colors as mentioned in this
[doc](https://www.notion.so/appsmith/Visual-changes-to-code-in-Appsmith-8bb530c60ee844e5b44adec039bf9280#d99e8450f022439f845b5a0d7deb1d3f).
> Add a TL;DR when description is extra long (helps content team)
Fixes#22992
Media
## Type of change
- New feature (non-breaking change which adds functionality)
## How Has This Been Tested?
- Manual
- Jest
### Test Plan
1. Verified JSeditor - variable functions keywords numbers operators
arguments function properties font and colour
2. Verified Property pane font and colour
3. Verified above in mac and windows machine
### Issues raised during DP testing
> Link issues raised during DP testing for better visiblity and tracking
(copy link from comments dropped on this PR)
## Checklist:
### Dev activity
- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] PR is being merged under a feature flag
### QA activity:
- [ ] Test plan has been approved by relevant developers
- [ ] Test plan has been peer reviewed by QA
- [ ] Cypress test cases have been added and approved by either SDET or
manual QA
- [ ] Organized project review call with relevant stakeholders after
Round 1/2 of QA
- [ ] Added Test Plan Approved label after reveiwing all Cypress test
---------
Co-authored-by: Ravi Kumar Prasad <ravi@appsmith.com>