Migrate UI code to Typescript

Moving to Typescript:

• @postgres.ai/shared is written on Typescript
• @postgres.ai/ce is written on Typescript
• @postgres.ai/platform is written on JavaScript and patially on Typescript. The target - is moving @postgres.ai/platform to Typescript fully. It should takes approximately 120-160 hours.
• There are potential problems with typing - old versions of packages may don't have their typings. Recommended to update them or replace. If it's impossible you can write your own typing in file named like <package-name>.d.ts inside src directory of the selected package.

Read more here: https://gitlab.com/postgres-ai/database-lab/-/tree/master/ui

The goal of this issue is to finalize migration to Typescript/