Adding tests for an LNPCP result (#105)

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## Description

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Migrating tests from selenium to playwright as per BCSS-20859

## Context

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Migrating tests from selenium to playwright as per BCSS-20859

## Type of changes

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the boxes that apply. -->

- [ ] Refactoring (non-breaking change)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would change existing
functionality)
- [ ] Bug fix (non-breaking change which fixes an issue)

## Checklist

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that apply. -->

- [x] I am familiar with the [contributing
guidelines](https://github.com/nhs-england-tools/playwright-python-blueprint/blob/main/CONTRIBUTING.md)
- [x] I have followed the code style of the project
- [x] I have added tests to cover my changes (where appropriate)
- [x] I have updated the documentation accordingly
- [ ] This PR is a result of pair or mob programming

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Author: adrianoaru-nhs

pages/datasets/investigation_dataset_page.py

@@ -386,7 +386,7 @@ def click_edit_dataset_button(self) -> None:
         """
         self.click(self.edit_dataset_button)
 
-    def assert_polyp_alogrithm_size(
+    def assert_polyp_algorithm_size(
         self, polyp_number: int, expected_value: Optional[str]
     ) -> None:
         """
@@ -418,7 +418,7 @@ def assert_polyp_alogrithm_size(
                 str(actual_value).strip() == str(expected_value).strip()
             ), f"Expected '{expected_value}', but got '{actual_value}'"
 
-    def assert_polyp_categrory(
+    def assert_polyp_category(
         self, polyp_number: int, expected_value: Optional[str]
     ) -> None:
         """