feat(ui): Migrate Configuration pages, stores, actions and api to Typescript (#351)

Description

Migrate @postgres.ai/platform to TypeScript.

This MR converts the following components/functions to TypeScript.

1. api

   1. depesz
   2. pev2
   3. api

2. pages

   1. JoeInstance
   2. JoeInstance/Messages
   3. JoeSessionCommand
   4. Profile
   5. SignIn

3. stores

   1. stores

4. actions

   1. actions

Related issue

#351 (closed)

Examples

Checklist

• MR description has been reviewed
• MR changes are functionally tested
• MR does NOT have API/CLI changes OR there are API/CLI changes and they have been reviewed & DOCS ARE ADJUSTED (reference doc, etc)
• MR does NOT have UI changes OR there are UI changes and they have been reviewed & UX IS REVIEWED

Closes #351 (closed)