improve filters

[nikgraf]

rework filter logic to match public filter logic

• logic operators are only allowed at the cross-field level
• re-throw filter error
• improve tests

follow up to #442

[Copilot]

Pull Request Overview

This PR improves filter logic to match public filter logic by restricting logical operators ('not', 'or') to only be allowed at the cross-field level, preventing their use within individual field filters.

• Adds validation to throw errors when logical operators are used at the field level
• Removes the 'and' operator restriction and simplifies filter evaluation logic
• Improves error handling by re-throwing filter validation errors

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/hypergraph/src/entity/findMany.ts	Updates filter evaluation logic to restrict logical operators and improves error handling
packages/hypergraph/test/entity/findMany.test.ts	Adds new test cases for field-level logical operator validation and updates existing tests
.changeset/mighty-numbers-run.md	Adds changeset documentation for the filter logic improvements