gemini prompt caching (RooCodeInc#3181)

* wip

* updated api tiered pricing schema for vertex and gemini to support tiered cache prices

* vertex too

* changeset

* pushing claude implementation

* addressing aras comments

* cleaning up caches

* linter complaining

* enabling total price for gemini provider

* Fixing Gemini Caching mechanism

* Update src/api/providers/vertex.ts

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

---------

Co-authored-by: Cline Evaluation <[email protected]>
Co-authored-by: arafatkatze <[email protected]>
Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

Author: 4 people

.changeset/lemon-pears-talk.md

@@ -0,0 +1,5 @@
+---
+"claude-dev": minor
+---
+
+enabled pricing calculation for gemini and vertex + more robust caching & cache tracking for gemini & vertex