feat: add support for embeddings api; fix[gpt]: context manager enter did not override; chore(yafma): export classes from submodules too

refactor: move core client functionality to a `base` class

fix(ci): omg gitlab is cool at not giving the branch info on tag

fix(example): reflect recent need for explicit `stream` value specification; fix[gpt]: untype args and kwargs (ma brain exploded)

feat[gpt]: replace response processing with new generic'd method + minor fixes

feat: update error handling and docs in gpt client and models

refactor: restructure modules, rename classes and attributes, update import statements, docstrings overhaul

fix(ci): adjust job rules and failure conditions

fix(module): properly export class from the module as per pyright recommendations

chore(deps): pin down versions for the building packages

chore(license): include full gpl v3 text

fix(ci): renaming to yafma should also be reflected in ruff checker

feat: relicense to lgpl + rename to `yafma` + rename llm client to `YandexGPTClient` + add pillow as dependecy for future yandexart support

chore(deps): update httpx 'till a major version; chore: bump to 0.4.3

fix: add content_filtered status for the choice status