Arabic, Hebrew, other Unicode support

[jottinger]

From Reddit: does it support Arabic? This creates other questions: Hebrew (and other left-to-right languages).

[DemchaAV]

Baseline landed. #141 (merged) adds a multilingual smoke test proving GraphCompose renders Hebrew/Arabic/Hungarian glyphs to a valid PDF (cross-platform: Windows/macOS/Linux). It does not make RTL correct yet.

Keeping this issue open to track full Arabic/Hebrew (RTL) support — the engine currently has no BiDi reordering and no Arabic shaping (text is drawn in logical order):

• RTL paragraph direction (explicit + auto base-direction)
• Right alignment for RTL paragraphs/blocks
• BiDi reordering (UAX Backport to Java 17 #9) for mixed Arabic/Hebrew + Latin + digits (java.text.Bidi or ICU4J)
• Arabic shaping / contextual forms (initial/medial/final/isolated, lam-alef)
• RTL-aware line wrapping
• Punctuation / bracket mirroring in RTL
• Snapshot/visual tests with known-correct output, verified by a native-script reader

Acceptance: a mixed Arabic/Hebrew + English + numbers paragraph renders with correct base direction, BiDi order, Arabic joining, and right alignment.