[Feature] Government Yield Curves + Chart

[deeleeramone]

WIP

1. Why? :

   • Standardize and consolidate yield curve endpoints.
   • Add EconDB to the mix with country parameter.
   • Add charts.

2. What? (1-3 sentences or a bullet point list):

   • To replace us_yield_curve and eu_yield_curve.
   • Not a replacement for treasury_rates, but could be expanded to be if desired.
   • Providers: econdb, ecb, federal_reserve, fmp, fred
   • Multiple dates allowed for all.
   • Chart compatible with all providers.

3. Impact (1-2 sentences or a bullet point list):

   • Deprecation warnings added to eu_yield_curve and us_yield_curve.

4. Testing Done:

   • Integration and unit tests
   • Chart integration tests
   • chart=True/False with all providers.

5. Reviewer Notes (optional):

   • Any specific focus areas for review?

   • Example: "Please check algorithm compatibility with existing data models."

6. Any other information (optional)

[IgorWounds]

@minhhoang1023 @andrewkenreich are you okay with EU and US yield curve endpoints getting replaced with this one?

[minhhoang1023]

@IgorWounds looks good to me. Can you please let @montezdesousa know as we need to deprecate those in Excel too.

[montezdesousa]

@IgorWounds looks good to me. Can you please let @montezdesousa know as we need to deprecate those in Excel too.

The changes are automatic once pro api updates and we redeploy Excel. Though we cannot send warnings in Excel

[hjoaquim]

Delivers!