Remove NPM and only use YARN

[leoromanovsky]

---

labels: mergeable

Fixes: #issue

Motivation and Context

Noticed that both yarn.lock and package-lock.json files are present; yarn looked more broadly used so I decided to stick to it.

Description

• remove usage of npm
• make pre-commit executable
• fix pre commit hook by adding lint-staged dev package

How has this been tested?

[leoromanovsky]

Test failure:

 FAIL  src/client/eppo-client.spec.ts
  ● Console

    console.error
      [Eppo SDK] Error logging assignment event: logging error

      149 |       this.assignmentLogger.logAssignment(event);
      150 |     } catch (error) {
    > 151 |       console.error(`[Eppo SDK] Error logging assignment event: ${error.message}`);
          |               ^
      152 |     }
      153 |   }
      154 |

      at EppoClient.logAssignment (src/client/eppo-client.ts:151:15)
      at EppoClient.getAssignment (src/client/eppo-client.ts:92:10)
      at Object.<anonymous> (src/client/eppo-client.spec.ts:249:31)

  ● EppoClient E2E test › getAssignment › test variation assignment splits

    expect(received).toEqual(expected) // deep equality

    - Expected  - 4
    + Received  + 4

      Array [
    -   10,
    -   10,
    -   10,
    -   5,
    +   null,
    +   null,
    +   null,
    +   null,
      ]

      181 |           ? getAssignmentsWithSubjectAttributes(subjectsWithAttributes, experiment)
      182 |           : getAssignments(subjects, experiment);
    > 183 |         expect(assignments).toEqual(expectedAssignments);
          |                             ^
      184 |       },
      185 |     );
      186 |   });

      at src/client/eppo-client.spec.ts:183:29

[chasdevs]

LGTM but what's with all the docs changes?

[leoromanovsky]

LGTM but what's with all the docs changes?

the pre-commit hook was broken until now (not executable) and there must have been a back-log of changes. personally I don't get the purpose of these docs and think I will just delete them.