Add node monitor diagnostics

[netsirius]

This pull request introduces several changes across multiple files to improve diagnostics capabilities, update dependencies, and refactor testing utilities. The most significant updates include the addition of node diagnostics functionality, refactoring of RNG usage in tests, and updates to dependency paths and versions.

Diagnostics Enhancements:

• Added a new NodeDiagnostics query type to NodeEvent and QueryResult enums to enable detailed diagnostics, including network state, subscriptions, and metrics. (crates/core/src/message.rs, [1] [2] [3]
• Implemented logic for collecting and responding to node diagnostics queries, including gathering node info, network info, subscriptions, contract states, system metrics, and peer details. (crates/core/src/node/network_bridge/p2p_protoc.rs, crates/core/src/node/network_bridge/p2p_protoc.rsR404-R557)
• Added a Diagnostics subcommand to the fdev CLI tool to query detailed node diagnostics. (crates/fdev/src/config.rs, [1]; crates/fdev/src/main.rs, [2]

Testing Utilities Refactor:

• Refactored base_node_test_config and gw_config_from_path functions to use an external RNG parameter instead of relying on a global RNG lock. (apps/freenet-ping/app/tests/common/mod.rs, [1] [2] [3] [4]

Dependency Updates:

• Updated freenet-stdlib dependency paths to local directories in multiple Cargo.toml files for better modularity and development flow. (Cargo.toml, [1]; apps/freenet-ping/Cargo.toml, [2]; apps/freenet-ping/app/Cargo.toml, [3]
• Added a new testing feature to freenet-stdlib in the core crate's dependencies. (crates/core/Cargo.toml, crates/core/Cargo.tomlR110)
• Updated freenet-stdlib version in test contracts for consistency. (tests/test-contract-metering/Cargo.toml, [1]; tests/test-delegate-integration/Cargo.toml, [2]

Miscellaneous:

• Removed unused last_update field from SubscriptionInfo mapping logic. (crates/core/src/client_events/mod.rs, crates/core/src/client_events/mod.rsL262)
• Incremented the version of the fdev package to 0.2.0. (crates/fdev/Cargo.toml, crates/fdev/Cargo.tomlL3-R3)