test(coverage): achieve 100% branch coverage across all test suites

test: improve coverage to 100% lines/statements/functions

fix: format vitest.config.ts

ci: fix coverage setup with vitest v8 provider

ci: add codecov badge and coverage upload

fix: set version 1.0.0 and fix release workflow

fix(release): add semantic-release plugins as devDependencies

fix(ci): upgrade to actions v5, drop Node 18 (EOL), fix validate-grit to cover all rule dirs

feat: initial release — 20 Angular rules for Biome 2.x