Ivan Malygin

chore: 11765 Migrate Merkle state classes to `swirlds-platform-core` module

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**Description**: This PR moves classes related to Hedera state to `swirlds-platform-core` module. **Related issue(s)**: Fixes #11765 **Notes for reviewer**: **Checklist** - [ ] Documented (Code comments, README, etc.) - [...

feat: 13135 Added PlatformState protobuf representation

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**Description**: This PR adds representation of `com.swirlds.platform.state.PlatformState` object. It's a prerequisite for https://github.com/hashgraph/hedera-services/issues/11771 **Related issue(s)**: Fixes # https://github.com/hashgraph/hedera-services/issues/13135 Related # https://github.com/hashgraph/hedera-services/issues/11771

refactor: 11771 Converted `PlatformState` into a Singleton

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**Description**: TBD **Related issue(s)**: Fixes #11771 **Notes for reviewer**: **Checklist** - [ ] Documented (Code comments, README, etc.) - [ ] Tested (unit, integration, etc.)

### Description This issue caused by the #14356 . The ISS detection tool is working with a `SignedState` instance, which, in its turn, contains an instance of `MerkleRoot`. The commit...

Self-contained `State` module

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This is the logical continuation of the Public Merkle API initiative (#10988). Also, it overlaps with #14772. Currently, a Block node would have to not only use the `swirlds-state-api` module...

feat: 15154 Added `createSnapshot` method to State API

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**Description**: This PR adds an implementation of `com.swirlds.state.State#createSnapshot` method. **Related issue(s)**: Fixes #15154 **Notes for reviewer**: **Checklist** - [ ] Documented (Code comments, README, etc.) - [ ] Tested (unit,...