Simplify pihole -v

[yubiuser]

What does this PR aim to accomplish?:

Simplify pihole -v by removing the ability to request every detail on its own.
Today pihole -v is mainly a wrapper for cat /etc/pihole/versions. There is no need to request every piece of information separately.
This PR will show basic version information with pihole -v which is suitable for approx. 95% of users running on master branch. A new option pihole -vv prints detailed information if necessary.

nanopi@nanopi:~$ pihole -v
Core version is v5.17.1-247-g4c35110 (Latest: v5.17.2)
Web version is v5.19-615-gc548aebe (Latest: v5.21)
FTL version is vDev-2b2ab3f (Latest: v5.23)

nanopi@nanopi:~$ pihole -vv
Core
    Version is v5.17.1-247-g4c35110 (Latest: v5.17.2)
    Branch is tweak/version
    Hash is 4c351103 (Latest: 4c351103)
Web
    Version is v5.19-615-gc548aebe (Latest: v5.21)
    Branch is dependabot/npm_and_yarn/development-v6/jquery-3.7.1
    Hash is c548aebe (Latest: c548aebe)
FTL
    Version is vDev-2b2ab3f (Latest: v5.23)
    Branch is development-v6
    Hash is 2b2ab3f5 (Latest: 2b2ab3f5)
nanopi@nanopi:~$ 

---

By submitting this pull request, I confirm the following:

1. I have read and understood the contributors guide, as well as this entire template. I understand which branch to base my commits and Pull Requests against.
2. I have commented my proposed changes within the code and I have tested my changes.
3. I am willing to help maintain this change if there are issues with it later.
4. It is compatible with the EUPL 1.2 license
5. I have squashed any insignificant commits. (git rebase)
6. I have checked that another pull request for this purpose does not exist.
7. I have considered, and confirmed that this submission will be valuable to others.
8. I accept that this submission may not be used, and the pull request closed at the will of the maintainer.
9. I give this submission freely, and claim no ownership to its content.

---

• I have read the above and my PR is ready for review. Check this box to confirm

[DL6ER]

How about switching to -vv automatically if one of the branches is != master ?

[github-actions]

This pull request has conflicts, please resolve those before we can evaluate the pull request.

[github-actions]

Conflicts have been resolved.

[DL6ER]

$ pihole -v
Core
    Version is v5.17.1-256-gc3c31a1a (Latest: v5.17.2)
    Branch is tweak/version
    Hash is c3c31a1a (Latest: c3c31a1a)
Web
    Version is v5.19-602-g854a99d4 (Latest: v5.21)
    Branch is tweak/save_button
    Hash is 854a99d4 (Latest: N/A)
FTL
    Version is v5.23-1403-gd6f13ac7 (Latest: v5.23)
    Branch is development-v6
    Hash is d6f13ac7 (Latest: d6f13ac7)