Router, add xrpc function interface, test in main

Adds an interface for adding xrpc queries and procedures that is a bit
simpler than directly interfacing with axum. Should provide good
scaffolding for next steps.

rust/Cargo.lock

@@ -92,6 +92,17 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "axum-macros"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "604fde5e028fea851ce1d8570bbdc034bec850d157f7569d10f347d06808c05c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "backtrace"
 version = "0.3.74"
@@ -281,7 +292,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "976dd42dc7e85965fe702eb8164f21f450704bdde31faefd6471dba214cb594e"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1099,6 +1110,7 @@ name = "rust"
 version = "0.1.0"
 dependencies = [
  "axum",
+ "axum-macros",
  "serde",
  "serde_json",
  "sqlx",
@@ -1121,7 +1133,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1525,7 +1537,7 @@ dependencies = [
  "getrandom 0.3.2",
  "once_cell",
  "rustix",
- "windows-sys 0.52.0",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]