This pull request updates the README.md to clarify TagIt's functionality, provide more detailed usage instructions, and add new sections for configuration, development, and troubleshooting. The documentation now better explains how TagIt manages Consul service tags, how to configure it, and how to resolve common issues.

Clarification of TagIt functionality:

• Rewrote the project description to clarify that TagIt replaces managed tags matching the tag-prefix and preserves non-prefixed tags, instead of simply appending script output.

Expanded usage and examples:

• Updated all example commands to use modern shell conventions and more realistic script paths, and expanded the examples to include script creation, service registration, running TagIt, generating a systemd file, and cleaning up tags. [1] [2] [3]

Configuration details:

• Added a new Configuration section describing CLI flags, config file support, and environment variable binding, including an example YAML config.

Development workflow:

• Introduced a Development section with Makefile targets for building, testing, and running integration tests with Docker Compose.

Troubleshooting guidance:

• Added a comprehensive Troubleshooting section covering common errors, systemd command requirements, quick checks for Consul and service status, and validation steps for cleanup.

New table of contents entries:

• Updated the table of contents to include the new Configuration, Development, and Troubleshooting sections.