fix(cli): make naming clearer and enforce `project_root` requirements.

fix(cli): fixed a bug where `update` will cause unintended deletion o…

…f embeddings.

fix(nvim): fix a typo.

feat(nvim): allow passing `project_root` as options when registering …

…buffers

fix(cli): remove excessive `finally` that may cause embedding functio…

…n bugs.

docs(nvim): inline documentation.

refactor(cli): only call `sys.exit` in `main.py`.

feat(cli): add `--no_stderr` option

chore(cli): use `scm` version scheme.

build(release): release 0.3.3