fix(fonts): update text-shaper to 0.1.27

[wiedymi]

Summary

• update the runtime dependency from text-shaper 0.1.26 to 0.1.27
• lock the published package and prepare restty 0.2.5
• restore VS16 color emoji rendering through single-glyph variation-sequence shaping
• preserve pair positioning when selectors occur between adjacent glyphs

Root cause

Text-shaper parsed cmap format 14 but did not consult it during shaping, so variation selectors survived as extra glyphs. Restty's color glyph recording requires single-glyph clusters, causing Apple Color Emoji VS16 sequences to be omitted from the canvas atlas. Text-shaper 0.1.27 maps format-14 variation sequences and removes surviving selectors after substitution but before positioning.

Validation

• installed-package probe confirms text-shaper 0.1.27
• A + VS16 + V has the same glyph IDs and [1273, 1413] advances as AV
• live Noto CJK format-14 IVS maps to the expected non-default glyph
• 316 CI-safe tests passed
• bun run check:themes
• bun run format:check
• bun run lint
• bun run build:types
• bun run build
• bun run playground:build
• release-note extraction for 0.2.5

Addresses #30

Upstream: wiedymi/text-shaper#5