feat: upgrade go 1.20 -> 1.23.1, complete colorizef migration, unify output consts

[sheikhrachel]

Purpose

• Removes redundant import alias for colorful that can be referenced from the import path
• in box.go, changes options -> boxOpts to avoid collision with the internal options & boxOptions structs in the neat package
• in table.go, changes options -> opts to avoid collision with the options struct defined in the same file
• Adds consts to remove the dependency on handwriting commonly used output strings (ex. node tags like "!!str" or "emptyStructures")
• Completes the deprecation of colorize -> colorizef by converting references, and adding a nil check in colorizef to skip the fmt.Sprintf call if the caller doesn't need to format a string
  • Additionally, adds a docstring to the function to surface this context for callers
• Updates the project's Go version to 1.23.1
  • recent release notes for reference:
    • 1.21
    • 1.22
    • 1.23

[sheikhrachel]

I've run the test suite locally to confirm continued expected behaviors after the minor version upgrade

Additionally, the current GHA workflows already leverage a go 1.23.x version when running their tasks

[sheikhrachel]

bump on this 🙏