Refactor documentation for clarity and consistency

[sifex]

Context

This pull request updates the documentation for Sigma rules, filters, and correlations to standardize code annotation syntax, improve clarity, and correct minor typos. The main change is replacing the old inline comment format (// [!code ...]) with the new hash-based format (# [!code ...]) across all example YAML blocks. Additionally, there are improvements to filter documentation, expanded filter usage examples, and some minor corrections to field values and explanatory text.

Standardization and Syntax Updates

• Updated all code annotation comments in YAML examples from // [!code ...] to # [!code ...] for consistency and clarity in docs/basics/conditions.md, docs/basics/log-sources.md, docs/basics/rules.md, docs/meta/correlations.md, docs/meta/filters.md, and docs/meta/index.md. [1] [2] [3] [4] [5] [6]

Documentation Improvements for Filters

• Enhanced the Sigma Filters documentation with expanded examples, including how to reference all rules within a logsource and clarified the distinction between exclusion and inclusion filters. Added code-group blocks and improved explanatory text. [1] [2]

Minor Corrections and Typos

• Fixed typos such as changing "build-in" to "built-in" and corrected YAML field values for consistency (e.g., using double quotes instead of single quotes, and aligning indentation). [1] [2] [3]

Cleanup of Deprecated or Redundant Sections

• Removed redundant or deprecated informational and falsepositive sections from correlation and filter examples to streamline the documentation. [1] [2] [3]

Formatting and List Consistency

• Standardized bullet point formatting in lists and code comments for better readability and consistency throughout the documentation. [1] [2]