fix(plugin-chart-period-over-period-kpi): Blank chart when switching from BigNumberTotal

[kgabryje]

SUMMARY

When user creates and saves a Big Number chart and then switches to Big Number Period over Period, the chart appears blank. The reason for that is that Period over Period chart expects the values coming from header_font_size control to be pixels. However, the old Big Number chart uses proportions (0.2-0.6) in that control, so when the new chart inherits those values, the size in pixels is <1, so it seems blank.
This PR implements a mapping between proportion values used in Big Number and actual pixel size values expected by Period over Period chart.

Additionally, this PR moves the KPI chart to a common directory with other BigNumber plugins so that they can share to font size controls.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

1. Create a new Big number chart using the Vehicle Sales chart.
2. Save the chart
3. Switch to Big Number with Time Period Comparison" chart
4. Finally, update the chart.
5. Verify that the chart renders correctly

TESTING INSTRUCTIONS

Before:

Screen.Recording.2024-02-22.at.14.43.40.mov

After:

Screen.Recording.2024-02-22.at.14.42.56.mov

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[Antonio-RiveroMartnez]

❤️ thanks for making these changes, I left a couple comments but nothing blocking.

[codecov]

Codecov Report

Attention: Patch coverage is 76.47059% with 4 lines in your changes missing coverage. Please review.

Project coverage is 69.68%. Comparing base (127df24) to head (dd23f80).
Report is 1509 commits behind head on master.

Files with missing lines	Patch %	Lines
...s/src/BigNumber/BigNumberPeriodOverPeriod/utils.ts	81.25%	0 Missing and 3 partials ⚠️
...s/src/BigNumber/BigNumberPeriodOverPeriod/index.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #27203      +/-   ##
==========================================
+ Coverage   69.58%   69.68%   +0.10%     
==========================================
  Files        1905     1908       +3     
  Lines       74580    74517      -63     
  Branches     8330     8309      -21     
==========================================
+ Hits        51893    51924      +31     
+ Misses      20637    20540      -97     
- Partials     2050     2053       +3     

Flag	Coverage Δ
javascript	57.18% <76.47%> (+0.17%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sadpandajoe]

🏷️ preset:2024.8