Generalize use of Typescript

[maxlath]

Addressing https://github.com/inventaire/inventaire/issues/682

Depends on https://github.com/inventaire/inventaire/pull/743

Further improvements can be done in the future to replace any types, which is the main barrier to turning tsconfig strict flag on.

Related PRs:

• https://github.com/inventaire/inventaire-client/pull/433
• https://github.com/inventaire/inventaire/pull/706