feat: uv migration (#3493)

* uv migration

smaller runners, freeze test runs, remove dev, ruff,hatchling, previw,
poetry, generates wheel, installs wheel, docker

* fix tests and dependency groups

* test fixes

* test fixing and main

* resolve merge conflict

* dev + test dependency group

* Test

* trigger CI

* trigger CI

* add debugging info

* trigger CI

* uv for reusable and sdk preview

* resolve mc and reformat black

* staged-api

* mypy

* fix fern

* prod Dockerfile

* model sweep, and project.toml and uvlock

* --group test -> --extra dev

* remove redundant --extra dev and rename tests to dev

* sdk backwards compat install sqlite

* install sqlite group for sdk-backwards-compat

* install uv on gh runner for cloud-api-integration-tests

* stage+publish

* pytest asyncio

* bug causing pytest package to get removed

* try to fix async event loop issues

* migrate to --with google-cloud-secret-manager

---------

Co-authored-by: Kian Jones <kian@letta.com>

examples/docs/example.py

@@ -7,7 +7,7 @@ See: https://docs.letta.com/quickstart
 If you're using Letta Cloud, replace 'baseURL' with 'token'
 See: https://docs.letta.com/api-reference/overview
 
-Execute this script using `poetry run python3 example.py`
+Execute this script using `uv run python3 example.py`
 
 This will install `letta_client` and other dependencies.
 """