fix(types): use 'import type' for type-only imports in SDK

[lightning-sagar]

Summary

This PR fixes incorrect type imports in the @stream-io/video-react-sdk.
All type-only imports now use import type instead of a regular import, following TypeScript best practices.

Changes

• Updated type imports in SDK source files

Why

• Ensures types are correctly stripped from compiled JavaScript
• Improves compatibility with bundlers (Vite, Next.js)
• Aligns with TypeScript best practices

Closes #1928

[oliverlaz]

hi @lightning-sagar, thank you for your effort and contribution. Before moving forward I'd like to ask you sign this CLA:

• https://docs.google.com/forms/d/e/1FAIpQLScFKsKkAJI7mhCr7K9rEIOpqIDThrWxuvxnwUq2XkHyG154vQ/viewform

Afterwards, to make this future-prone and performant, can you please update our TS config files and enable the verbatimModuleSyntax?

• https://www.typescriptlang.org/tsconfig/#verbatimModuleSyntax

I expect yarn build:all to start failing for other packages, but once everything is green, we can move forward and accept this PR.

[lightning-sagar]

Hi @oliverlaz, I’ve addressed the changes you requested... however, after running yarn build:all, there are a lot of unused variable warnings across the SDK... should I leave them as is for now? as for now it didn't block the build.

[lightning-sagar]

Hi @oliverlaz , I’ve pushed the latest changes,everything is now updated as requested...
I ran yarn build:all and it passes successfully without failures.

⚠️ There are still warnings about unused variables/components across the packags, but they don’t block or break the build...

[oliverlaz]

hey @lightning-sagar, I don't expect to see "unused variables" issues. Can you please share a sample output here?

[lightning-sagar]

hi @oliverlaz , sorry for the earlier confusion! just to clarify, the warnings I mentioned are related to unused external imports (e.g., Observable, Subject from rxjs, and UnaryCall from @protobuf-ts/runtime-rpc) these are showing up during the build but dont block or break it...

✅ I’ve completed all requested changes:

• Updated all type-only imports to use import type
• Enabled verbatimModuleSyntax in the TS config
• Ran yarn build:all, all packages build successfully with no errors...

is there anything else you'd like me to address, or are we good to proceed with the review/approval???

[lightning-sagar]

hi @oliverlaz ,
I’ve made all the requested changes (type-only imports, verbatimModuleSyntax, and confirmed yarn build:all passes)
Is the PR ready for approval, or would you like me to address anything else?

Thanks!

[oliverlaz]

Hi @lightning-sagar, thanks for your contributions.
I'll review this PR in more detail later this week, and if everything is good, I'll go ahead and merge it.