* feat: initial commit with prompt management support on pre-call hooks
allows prompt templates to work before assigning specific models
* feat: initial logic for independent prompt management settings
* feat(proxy_server.py): working logic for loading in the prompt templates from config yaml
allows creating an independent 'prompts' section in the config yaml
* feat(prompt_registry.py): working e2e custom prompt templates with guardrails and models
* refactor(prompts/): move folder inside proxy folder
easier management for prompt endpoints
* feat(prompt_endpoints.py): working `/prompt/list` endpoint
returns all available prompts on proxy
* feat(key_management_endpoints.py): support storing 'prompts' in key metadata
allows giving keys access to specific prompts
* feat(prompt_endpoints.py): enable key-based access to /prompts/list
ensures key can only see prompts it has access to
* fix(init_prompts.py): fix linting error
* fix: fix ruff check
* fix(proxy/_types.py): add 'prompts' to newteamrequest
* fix(litellm_logging.py): update logged message with scrubbed value
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