feat: expose provider sandbox instances (E2B + Daytona) #2152

Job	Run time
Build (Node 22)	3m 52s
PostgreSQL Integration Tests	32s
Commitlint	12s
Build (Node 24)	3m 50s
Lint (Node 22)	1m 23s
Lint (Node 24)	1m 29s
Build (Node 20)	3m 14s
Lint (Node 20)	59s
Test docs-mcp	1m 9s
Test libsql	1m 45s
Test create-voltagent-app	1m 30s
Test core	2m 4s
Test logger	1m 15s
Test server-core	1m 38s
Test cli	1m 51s
Test internal	1m 10s
Test voice	1m 39s
Test supabase	1m 46s
Test postgres	1m 29s
	32m 47s

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