refactor: update SDK and agent-kit imports and dependencies

[MWBlocky]

Update SDK, agent-kit, and langchain dependencies

Summary

• Migrate from hedera-agent-kit and hedera-agent-kit-langchain to @hashgraph/hedera-agent-kit and @hashgraph/hedera-agent-kit-langchain
• Update SDK from @hashgraph/sdk to @hiero-ledger/sdk (v2.82.0)
• Migrate langchain from langchain v0.x to @langchain/classic for backward-compatible agent APIs
• Update bundler external config to reflect new package names

Breaking Changes

• SDK: Renamed package @hashgraph/sdk → @hiero-ledger/sdk
• Agent Kit: Renamed packages hedera-agent-kit → @hashgraph/hedera-agent-kit and hedera-agent-kit-langchain → @hashgraph/hedera-agent-kit-langchain
• LangChain: Legacy agent APIs (AgentExecutor, createToolCallingAgent, BufferMemory) moved to @langchain/classic

Files Changed

File	Changes
package.json	Updated dependencies and peer dependencies
src/client.ts	Updated 5 imports + coreQueriesPlugin/coreAccountPlugin → allCorePlugins
src/index.ts	Updated 2 imports
src/plugin.ts	Updated 1 import
src/tools.ts	Updated 2 imports
src/tools/*.ts	Updated 2 imports each (5 files)
src/bonzo/utils.ts	Updated 1 import
src/bonzo/bonzo.zod.ts	Updated 1 import
tsup.config.ts	Updated external array

[skurzyp-blockydevs]

The double step tools (core action for TX building and secondary for serialization/signing) reffers to all of the tools.

[MWBlocky]

@gaurangtorvekar this pr is ready to merge

[gaurangtorvekar]

Hey @MWBlocky thanks for this! I looked at the code, it looks alright, but we need to update the Readme. It's stale now. Can you do that please?

[MWBlocky]

@gaurangtorvekar README.md is ready :)
Could you also release new versions on npm? I see that github actions aren't set up, so it's not running automatically.

[MWBlocky]

@gaurangtorvekar bump

[MWBlocky]

@gaurangtorvekar bump

[MWBlocky]

@gaurangtorvekar bump

[MWBlocky]

@gaurangtorvekar Could you also release new versions on npm? I see that github actions aren't set up, so it's not running automatically.