* remove remaining parts of the Gratitude Pallet

This upgrade should be fast track to prevent potential misuse of the gratitude pallet.

The proposal aims to develop the KILT Decentralized Identity Provider (DIP), offering an OpenID-like authentication flow for Web3. It enables cross-chain identity establishment by using on-chain and off-chain mechanisms. Led by BOTLabs GmbH, seeks to reduce centralization in identity management while providing users control over their data. Key components include pallets for identity providers and relying parties, along with support crates for chain runtimes. The proposal outlines milestones for development, testing, and deployment, highlighting the need for ongoing maintenance and future enhancements

Updated metadata docs for Polkadot & Kusama parachain and stand-alone runtimes.

Implemented new Polkascan Explorer and Subsquid extensions to the py-substrate-interface extension framework.

Technical support on Github and in #polkascan:matrix.org and substrate.stackexchange.com channels.

Upgrade contract interface to support WeightV2 #337.

New runtime interface: more intuitive approach to interface with the runtime functionality.

Add support for runtime calls at other blocks than the most recent #346.

Added support for ink! v4

Added multiple params as key support for query_map().

Added SCALE type definitions for upcoming MetadataV15 in Substrate.

Schedule a majority-carries referendum to be tabled next once it is legal to schedule
an external referendum.

The dispatch of this call must be `ExternalMajorityOrigin`.

- `proposal_hash`: The preimage hash of the proposal.

Unlike `external_propose`, blacklisting has no effect on this and it may replace a
pre-scheduled `external_propose` call.

Weight: `O(1)`

- They want to remove the remaining parts of the Gratitude Pallet.
- They want to do this quickly to prevent misuse.
- The Gratitude Pallet is something that people can use to show appreciation.
- They want to make sure it is used properly.
- They are taking action to remove any leftover parts.

#5 Version 1.3.1