Refactor/deduplicate config path constants

[wdeveloper16]

Summary

GITTENSOR_DIR and CONFIG_FILE were defined identically in two places:

• cli/main.py:28-29
• cli/issue_commands/helpers.py:48-49

Moves the canonical definition to gittensor/constants.py. Both files now import from there.
Also removes the now-unused from pathlib import Path import from helpers.py.

constants.py is used as the shared home to avoid a circular import -
main.py already imports from issue_commands/__init__.py → helpers.py.

Test plan

• pytest tests/cli/ tests/utils/, no new failures

[anderdc]

just move it and export it from helpers, doesn't need to be moved all the way up to constants.py.

Or just keep it in cli/main.py and have helper import it from there.

Either way these are just for the CLI and not needed across the codebase

[wdeveloper16]

Hi, @anderdc
Good point! these are CLI-only and don't belong in constants.py.

One thing worth noting: option 2 (keep in main.py, import from there in helpers.py) would create a circular import - main.py already imports from issue_commands/__init__.py, which imports helpers.py, so importing back from main.py would close the loop.

Option 1 (define in helpers.py, have main.py import from there) doesn't have that issue.
Happy to update the PR to do that instead.

[anderdc]

I see what you mean, we'll just leave it as is, simple dedup

[wdeveloper16]

Thanks for your review, @anderdc
And sorry for my CI failure.
I will fix it right now.

[wdeveloper16]

Hi, @anderdc
Would you please review it again? 🙏
I'm sure CI will be passed.