Updated testing directories and file names

[lecegues]

Patch:

• Removed .env by adding to .gitignore

Scripts:

• 'npm run unit-test': runs all unit tests
• 'npm run integ-test': runs all integration tests

File Changes:

• all unit tests must end with ".unit.test"
• all integration tests must end with ".integ.test"
• e2e directory changed to /testing directory
  • holds all system-wide tests (e2e, system, load, performance)

[DanielleDPowell]

Great work

[keliboi]

Feature working as intended, runs only unit or integration test files/scripts depending on command.