[Feature] - Custom deprecation (#6005)

* custom deprecation

* custom deprecation

* using the new deprecation

* custom deprecation on the package builder

* remove comment

* ruff

* black

* static assets

* tests

* using parametrization instead

* test for deprecated endpoints (#6014)

* Deprecation warning on the reference docs (#6015)

* typo/fix

* bring back methods needed for markdown generation

* add deprecation warning to docs

* contributor docs for deprecating endpoints - tks @deeleeramone

* small changes on publishing procedure per @the-praxs

* moving the deprecation summary class to deprecation file instead

* explanation on class variables

* Update website/content/platform/development/contributor-guidelines/deprecating_endpoints.md

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

* Update website/content/platform/development/contributor-guidelines/deprecating_endpoints.md

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

* Update website/content/platform/development/contributor-guidelines/deprecating_endpoints.md

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

* Update openbb_platform/openbb/package/index.py

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

* Update website/content/platform/development/contributor-guidelines/deprecating_endpoints.md

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

* Update website/content/platform/development/contributor-guidelines/deprecating_endpoints.md

Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

* deprecating on 4.3 instead @the-praxs

---------

Co-authored-by: Igor Radovanovic <74266147+IgorWounds@users.noreply.github.com>
Co-authored-by: Pratyush Shukla <ps4534@nyu.edu>

openbb_platform/openbb/package/module_map.json

@@ -140,4 +140,4 @@
     "regulators_sec_schema_files": "/regulators/sec/schema_files",
     "regulators_sec_sic_search": "/regulators/sec/sic_search",
     "regulators_sec_symbol_map": "/regulators/sec/symbol_map"
-}
+}