release: v0.0.8

[oahsiao]

Release v0.0.8 - bumps app version 0.0.7 -> 0.0.8.

Captures the dependency + CI updates merged since 0.0.7:

• Electron 31.7.7 -> 43.0.0 (deps-dev: bump electron from 31.7.7 to 43.0.0 #35) - smoke-tested locally, launches cleanly on Node 24
• electron-builder 24.13.3 -> 26.15.3 (deps-dev: bump electron-builder from 24.13.3 to 26.15.3 #34)
• pidusage 3.0.2 -> 4.0.1 (deps: bump pidusage from 3.0.2 to 4.0.1 #36)
• CI: GitHub Actions bumped to latest majors + Dependabot added (ci: bump GitHub Actions to latest majors + add Dependabot #33)

After merge: push tag v0.0.8 to trigger release.yml (builds x64 + arm64 NSIS installers, publishes the GitHub Release).