Issue #444: Improve CasToComparableText

[reckart]

What's in the PR

• Enhance CasToComparableText: add HTML renderer (in addition to CSV).
• Add configurable columns: <ANCHOR>, <INDEXED>, <COVERED_TEXT> and setMaxLengthCoveredText.
• Stable, disambiguated anchors: optional unique anchors, sofa id marker, indexed marker, optional anchor feature hash.
• Deterministic ordering: sort annotation-valued multi-valued features; feature-hash tie-breaker; indexed-first tie-break.
• Exclude features/types via regex patterns with compiled-pattern cache.
• Treat empty strings as null and configurable nullValue.
• Robust multi-valued support: arrays and list types rendered recursively with primitive-array handling.
• New configuration API (setters/getters) for rendering options (e.g., setOmitXmlDeclaration, setAnchorFeatureHash, setUniqueAnchors, etc.).
• Update CasToComparableTextTest to cover HTML output, exclusions, ordering, anchor hashing and array/list rendering.

How to test manually

• No specific test procedure

Automatic testing

• PR adds/updates unit tests

Documentation

• PR adds/updates documentation

Organizational

• PR adds/updates dependencies.
  _{^{Only dependencies under approved licenses are allowed. LICENSE and NOTICE files in the respective modules where dependencies have been added as well as in the project root have been updated.}}