Introduce versioninfo() and about()

[ytdHuang]

close #64
Add two (same) methods which will output the information of QuantumToolbox, dependencies, and system information:

• QuantumToolbox.versioninfo()
• QuantumToolbox.about(): similar to QuTiP

The current output is something like:

 QuantumToolbox.jl: Quantum Toolbox in Julia
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Copyright © QuTiP team 2022 and later.
Current admin team: Alberto Mercurio, Yi-Te Huang

Package information:
====================================
QuantumToolbox  Ver. 0.7.2
LinearSolve     Ver. 2.28.0
OrdinaryDiffEq  Ver. 6.74.1

System information:
====================================
Julia Version: 1.10.2
OS       : Windows (x86_64-w64-mingw32)
CPU      : 6 × Intel(R) Core(TM) i5-9600K CPU @ 3.70GHz
Memory   : 15.918 GB
WORD_SIZE: 64
LIBM     : libopenlibm
LLVM     : libLLVM-15.0.7 (ORCJIT, skylake)
BLAS     : libopenblas64_.dll (ilp64)
Threads  : 1 (on 6 virtual cores)

@albertomercurio
What do you think ?
Do you want to add some intro., developer names, package information, or modify anything ?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.25%. Comparing base (7f98c8e) to head (d1b51e0).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #88      +/-   ##
==========================================
+ Coverage   92.15%   92.25%   +0.10%     
==========================================
  Files          18       19       +1     
  Lines        1721     1744      +23     
==========================================
+ Hits         1586     1609      +23     
  Misses        135      135              

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[albertomercurio]

It's fine. Maybe also add Luca Gravina to the admin team.