DLTK installation: enhances

[albertmena]

• Installation Log
  Save the complete installation log to installationLOG.txt.

• Environment Installation Resilience
  Do not stop installing other environments if one of them fails.

• Libmamba Recommendation
  Inform users that using libmamba is the fastest way to perform installations.

• Anaconda Channel

  • Document that the Anaconda channel is required.
  • Check if it is available before starting the installation, or add it using:

    conda config --add channels conda-forge

• Automatic DLTK Installation in Xmipp
  Include a flag to allow automatic DLTK installation after Xmipp is installed.

• Environment Update Option

  • Remove the option to update environments during installation, as it may increase conflict possibilities.
  • Consult with @oierlauzi before implementing this change.

• Clearer Error Messages
  Avoid chaining commands in error messages to make the source of the error more evident.

• Final Installation Message
  Improve the final message to include a summary of successfully created environments.