niri_ipc::Socket; niri msg version; version checking on IPC (#278)

* Implement version checking in IPC

implement version checking; streamed IPC

streamed IPC will allow multiple requests per connection

add nonsense request

change inline struct to json macro

only check version if request actually fails

fix usage of inspect_err (MSRV 1.72.0; stabilized 1.76.0)

"nonsense request" -> "return error"

oneshot connections

* Change some things around

* Unqualify niri_ipc::Transform

---------

Co-authored-by: Ivan Molodetskikh <yalterz@gmail.com>

Cargo.toml

@@ -14,6 +14,7 @@ anyhow = "1.0.81"
 bitflags = "2.5.0"
 clap = { version = "~4.4.18", features = ["derive"] }
 serde = { version = "1.0.197", features = ["derive"] }
+serde_json = "1.0.115"
 tracing = { version = "0.1.40", features = ["max_level_trace", "release_max_level_debug"] }
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 tracy-client = { version = "0.17.0", default-features = false }
@@ -67,7 +68,7 @@ portable-atomic = { version = "1.6.0", default-features = false, features = ["fl
 profiling = "1.0.15"
 sd-notify = "0.4.1"
 serde.workspace = true
-serde_json = "1.0.115"
+serde_json.workspace = true
 smithay-drm-extras.workspace = true
 tracing-subscriber.workspace = true
 tracing.workspace = true