feat(typography): add JUSTIFIED horizontal alignment for bounded text in 2D renderer

[Vansh0204]

PR 1

• Adds textAlign(JUSTIFIED) support in the 2D renderer for bounded text(...) .
• Distributes inter-word spacing to fill maxWidth on non-final lines; final line remains ragged.
• Canvas2D maps JUSTIFIED to LEFT internally; WEBGL remains left-aligned for now.
• Lint/build pass locally. Follow-up PR will add textWrap(PRETTY) and BALANCE .

Addresses #7712