feat: bump ghdash version to 0.3.1 in Cargo.toml, Cargo.lock, and Hom…

…ebrew formula

feat: update ghdash version to 0.2.0 and refactor search overlay rend…

…ering

feat: add browser utility for opening URLs

feat: implement configuration management with AppConfig struct

feat: add time utility for formatting timestamps

test: add unit tests for cache functionality

test: add unit tests for configuration loading

test: add unit tests for GraphQL models serialization

test: add unit tests for application state management

test: add unit tests for time utility functions