Update langchain dependency to >= v1.0.0

[eduard-kolotushin]

Current dependencies:

[tool.poetry.dependencies]
python = ">=3.9,<4.0"
langchain-core = "^0.3"
gigachat = "^0.1.41.post1"
types-requests = "^2.32"

langchain-core has released v1.0.0 for a while, so it would be good if langchain-gigachat installation didn't conflict with langchain installation.
Current langchain-core release is v1.0.3
If you try to install langchain-gigachat after there was langchain installed it will throw a package versions resolution error.

[Rai220]

Already in test. Please check langchain_gigachat==0.3.13a1