feat: add health check command and improve diagnostics in health-check script

[manghidev]

This pull request introduces a new make health command to perform comprehensive health diagnostics for the LazyVim Docker environment. It also refactors the health-check.sh script for better clarity and functionality. Documentation updates have been made to reflect the new command and its usage.

New Feature: Health Diagnostics

• Added a make health command to the Makefile, which runs the health-check.sh script to perform a comprehensive health check of the LazyVim environment.

Documentation Updates

• Updated README.md to include the make health command in the list of available commands and removed the direct invocation of ./scripts/health-check.sh from the examples. [1] [2]
• Added make health to the command reference in docs/COMMANDS.md.

Script Enhancements

• Refactored health-check.sh to improve container state handling:
  • Replaced redundant checks for container existence and state with a single docker inspect command.
  • Improved messaging for different container states (e.g., missing, stopped, running).
  • Adjusted final status messages to provide clearer guidance for next steps based on the container's state.