build: Text Coverage + Fixed Go Version Requirement

[DylanDevelops]

Pull Request Checklist

• I have read and followed the contribution guidelines.
• My pull request targets the main branch of tmpo.
• I have tested these changes locally on my machine.

Description

This pull request introduces several improvements to testing, documentation, and configuration for Go version compatibility. The most significant updates are the addition of comprehensive unit tests for core validation and utility functions, an upgrade to Go 1.25 across the codebase and documentation, and the inclusion of new test dependencies.

Testing Improvements:

• Added new unit tests for project name detection, hourly rate validation, and related logic in cmd/init_test.go.
• Added unit tests for date, time, and datetime validation and parsing in cmd/manual_test.go.
• Added tests for project name detection logic in cmd/start_test.go.
• Added tests for version formatting and changelog URL generation in cmd/version_test.go.

Go Version Upgrade:

• Updated Go version requirement to 1.25 in GitHub Actions workflows (.github/workflows/release.yml, .github/workflows/test.yml), documentation (CONTRIBUTING.md, docs/installation/linux_installation.md, docs/installation/macos_installation.md, docs/installation/windows_installation.md), and Go modules (go.mod). [1] [2] [3] [4] [5] [6] [7] [8]

Test Dependency Updates:

• Added github.com/stretchr/testify and other indirect dependencies in go.mod to support new and existing tests.

CI Improvements:

• Enhanced test workflow to include running unit tests and tests with race detection in .github/workflows/test.yml.

Screenshots