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

[dhowe]

@Vansh0204 have you created tests for this feature?

[Vansh0204]

Thanks for reviewing, sir! I haven't added tests yet – I'll add comprehensive unit tests for JUSTIFIED alignment in the 2D renderer covering inter-word spacing distribution and edge cases. I'll push them shortly.

[dhowe]

a good place to start would be the alignment tests in https://github.com/processing/p5.js/blob/dev-2.0/test/manual-test-examples/type/index.html

eventually we will also need pixel-based tests like those here: https://github.com/processing/p5.js/blob/dev-2.0/test/unit/visual/cases/typography.js