Add prospector to Projects Discussing pyproject.toml.

[carlosperate]

Resource description

prospector - A tool to analyse Python code and output information about errors, potential problems, convention violations and complexity.

By submitting this pull request I confirm I've read and complied with the below requirements

• I have read and understood the Contribution Guidelines
• I am making an individual pull request for each entry
• I have added a useful title to the commit
• I have added a useful title to this PR
• I have added the new entry in alphabetical order
• I have used the following format:

  - [Resource Title](link) - Resource short Description (2 lines or less in total)
  

• The new entry meets one of these categories:
  • Is configured via its own tool sub-table in the pyproject.toml file (i.e., [tool.xxx])
  • Is a project template using the pyproject.toml file
  • Is an article about the pyproject.toml file
  • Is a link to a project discussion about pyproject.toml support