chore: release v0.6.2 (#93)

Bump the project version to 0.6.2 in build.zig.zon and src/main.zig so the
v0.6.2 tag matches (the release workflow verifies this before publishing).

Includes #92 (Fixes #91): detect the system light/dark theme inside boo
sessions by answering OSC 11 and the color-scheme DSR from the daemon.

chore: release v0.6.1 (#90)

Bump version to 0.6.1 in build.zig.zon and src/main.zig for the v0.6.1 release.