Who created the Lightning Web Component?

To get CreatedBy, CreatedDate, LastModifiedDate fields values of your LWC bundle you can perform Tooling API request of the LightningComponentBundle

Also, you can use your Developer Console, and perform SOQL query with Tooling API:

SELECT Id, DeveloperName, CreatedBy.Name, CreatedDate, LastModifiedDate
FROM LightningComponentBundle
/* Optional filters */

Only Aura components are exposed for querying by SOQL but LWC components are not exposed for querying (But can query from tooling API - shown in answer by @OlehBerehovskyi). However, you find both Aura and LWC in Setup > Quick find > Lightning Components.

Notice the Type column which gives info of Aura/LWC. Also you can get CreatedBy, CreatedDate and the LastModifiedDate of a LWC