docs: fix typos, spelling and docstring formatting in vectorisers

[jamie-ons]

✨ Summary

Tidy up docstrings across the vectorisers module

📜 Changes Introduced

• fixed typos
• converted english us -> english uk with the exception of arguments such as tokenizer.
• Capatalised Ollama in non code places
• Updated __init__.py module overview to be consistent with base.py as they were near identical apart from a few words.
• Removed some attributes as they weren't attributes in the code and were documented in the methods arguments

✅ Checklist

• Code passes linting with Ruff
• Security checks pass using Bandit
• API and Unit tests are written and pass using pytest
• Terraform files (if applicable) follow best practices and have been validated (terraform fmt & terraform validate)
• DocStrings follow Google-style and are added as per Pylint recommendations
• Documentation has been updated if needed

🔍 How to Test

• Have a read through the docstrings make sure the changes seem reasonable
• Check that my change of the __init__.py hasn't / wont cause issues with quarto (i changed * -> - for bullet pointing to be consistent with base.py.
• Check the docstring format against googles style guide - https://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings

[rileyok-ons]

Ran it over with some stricter doc linting, seems great, got a couple newlines you need after the docstring summary, https://docs.astral.sh/ruff/rules/missing-blank-line-after-summary/ checked and its part of the google python style guide https://google.github.io/styleguide/pyguide.html#38-comments-and-docstrings
A docstring should be organized as a summary line (one physical line not exceeding 80 characters) terminated by a period, question mark, or exclamation point. We currently have an ignore for this rule in our ruff config when actually we shouldn't, I'm going to remove it in my changes

[jamie-ons]

Have added the new lines.

However have noticed that most one line summaries are over 80 characters. Should I rewrite all summaries to be <=80 characters. This would make it comply fully with the google python style guide but also seems quite strict?

We dont have any that are so long that they are unreadable but for example

Initialises the GcpVectoriser with the specified project ID, location, and model name.

This is 86 characters long and so wouldnt comply

[rileyok-ons]

Have added the new lines.

However have noticed that most one line summaries are over 80 characters. Should I rewrite all summaries to be <=80 characters. This would make it comply fully with the google python style guide but also seems quite strict?

We dont have any that are so long that they are unreadable but for example

Initialises the GcpVectoriser with the specified project ID, location, and model name.

This is 86 characters long and so wouldnt comply

Checked and current idea is we're not strict on the line length

[rileyok-ons]

As an additional thing can you add types to the ABC vectorizser docstring