0.3.x - Let's make rspc suck less

[oscartbeaumont]

It would be really sick if this was the last one of these lol.

0.4.0:

• Router v2 #326

0.4.1:

• Migrating to the new documentation site so we can have everything up to date.
• Stablise rspc_axum::Endpoint with the new wire protocol & Tauri new wire protocol
• Query options + proxy API and drop links system

0.4.2:

• Stablise rspc::modern syntax
• Come to a conclusion on - Tuple for routes #313
• New procedure syntax
  • Procedure2
  • ProcedureBuilder
  • Router::procedure
• New middleware syntax (discuss in releases/docs the removal of router-level middleware)
• Router::setup
• Router::build_with_state
• State
• Mount rspc-devtools via Router::setup???

0.3.x (final minor, done at same time as major):

• Set min Rust version
• public vs private dependencies
• Maybe rename rspc_axum to rspc_tower
• Mark everything deprecated
• Feature flag which disable all deprecated API's like next major will have.
• Cleanup internal modules/naming procedure_* should be procedure/*
• Drop Specta macros feature from rspc???
• Cleanup old branches
• Document using Cookies with rspc
• Redirect rspc.dev to new Specta site
• Yank all v1-rc releases

Future:

• Stablise rspc_client
• Content types in rspc-axum. Eg. formdata, xml, etc
• Using a proper matching library based on trees instead of just hashmap for procedures.
• Bring back examples.

Future Breaking changes:

• Feature flag for source map support

Cleanup:

• Drop rspc-legacy
• Drop rspc_procedure::LegacyErrorInterop
• Remove legacy bindings logic in rspc::Typescript

[marcocondrache]

I believe the last three points of the 0.3.1 release should be separated, as they represent more significant changes compared to the first three points, which are actually critical bug fixes.