Update SDK Classification on docs.hedera.com

## Objective
Update the SDK page to simplify SDK presentation and better reflect the current support model by organizing all SDKs into two sections:

- Official SDKs
- Community SDKs

Current page:
https://docs.hedera.com/hedera/sdks-and-apis/sdks

## Background
The current SDK page separates SDKs into:

- Consensus Node Code SDKs
- Additional Language Support

There is then an additional label on who supports the SDK i.e. "Maintainer:Hiero" or "Maintainer:Community".

This update should align the structure more closely with industry examples such as the SDK documentation:
https://solana.com/docs

## Proposed Changes

### Replace Existing Sections
Update layout to:

## Official SDKs
List the officially supported Hiero SDKs:
- JavaScript SDK
- Java SDK
- Go SDK

## Community SDKs
List community-supported SDKs:
- Python SDK
- Rust SDK
- C++ SDK
- Swift SDK

## Additional Changes
- Remove all “Maintainer” labels from SDK entries
- Preserve existing links to each SDK repository and documentation
- Keep existing descriptions for each SDK unless minor edits are needed for consistency