clnrest: add more valid request and response types

Changelog-Added: clnrest can now return successful responses as xml, yaml, or form-encoded in addition to json defined in the 'Accept' header. The same goes for request types defined in the 'Content-type' header.

Cargo.lock

@@ -482,9 +482,13 @@ dependencies = [
  "hyper 1.6.0",
  "log",
  "log-panics",
+ "quick-xml",
  "rcgen",
+ "roxmltree_to_serde",
  "serde",
  "serde_json",
+ "serde_qs",
+ "serde_yml",
  "socketioxide",
  "tokio",
  "tokio-util",
@@ -1240,6 +1244,16 @@ version = "0.2.172"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d750af042f7ef4f724306de029d18836c26c1765a54a6a3f094cbd23a7267ffa"
 
+[[package]]
+name = "libyml"
+version = "0.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3302702afa434ffa30847a83305f0a69d6abd74293b6554c18ec85c7ef30c980"
+dependencies = [
+ "anyhow",
+ "version_check",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.9.4"
@@ -1604,6 +1618,16 @@ dependencies = [
  "prost",
 ]
 
+[[package]]
+name = "quick-xml"
+version = "0.37.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "331e97a1af0bf59823e6eadffe373d7b27f485be8748f71471c662c1f269b7fb"
+dependencies = [
+ "memchr",
+ "serde",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.40"
@@ -1759,6 +1783,25 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "roxmltree"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c20b6793b5c2fa6553b250154b78d6d0db37e72700ae35fad9387a46f487c97"
+
+[[package]]
+name = "roxmltree_to_serde"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4eabe602f48dfc72e56d9beefcefe457c2898b3b4853ba4aa836804e49732460"
+dependencies = [
+ "regex",
+ "roxmltree",
+ "serde",
+ "serde_derive",
+ "serde_json",
+]
+
 [[package]]
 name = "rust-embed"
 version = "8.7.1"
@@ -2008,6 +2051,17 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_qs"
+version = "0.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3faaf9e727533a19351a43cc5a8de957372163c7d35cc48c90b75cdda13c352"
+dependencies = [
+ "percent-encoding",
+ "serde",
+ "thiserror 2.0.12",
+]
+
 [[package]]
 name = "serde_urlencoded"
 version = "0.7.1"
@@ -2020,6 +2074,21 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_yml"
+version = "0.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "59e2dd588bf1597a252c3b920e0143eb99b0f76e4e082f4c92ce34fbc9e71ddd"
+dependencies = [
+ "indexmap 2.9.0",
+ "itoa",
+ "libyml",
+ "memchr",
+ "ryu",
+ "serde",
+ "version_check",
+]
+
 [[package]]
 name = "sha1"
 version = "0.10.6"