feat: blueprint-serde crate (#429)

* feat: `blueprint-serde` crate

This crates lets us convert to and from the `Field` type easily with `serde`'s `Serialize` and `Deserialize` traits.
This will allow for custom types in job parameters, as well as making it easier overall to convert between these types.

The crate adds two public functions:

* `to_field` - Convert any `Serialize` type into a `Field`
* `from_field` - Attempt to convert a `Field` into a `DeserializeOwned` type

While mostly useful for `Field::Struct`, one can also do:

```rust
let age: u8 = gadget_blueprint_serde::from_field(Field::Uint8(40)).unwrap();
```

Or conversion for any primitive type, if they wanted.

* chore(gadget-blueprint-serde): simplify primitive & struct deserialization

* fix(gadget-blueprint-serde): add unit serialization

* chore(gadget-blueprint-serde): move `serde-test` to dev dependencies

* chore(gadget-blueprint-serde): improve docs and add examples

* feat(gadget-blueprint-serde): force `#![no_std]`

* feat(gadget-blueprint-serde): add `std` feature

* chore(gadget-blueprint-serde): add tests for enums

* chore(gadget-blueprint-serde): defer enum variant deserializing

* chore: bump `tangle-subxt`

Cargo.toml

@@ -12,6 +12,7 @@ members = [
     "gadget-io",
     "blueprint-test-utils",
     "blueprint-manager",
+    "blueprint-serde",
     "sdk",
     "macros/blueprint-proc-macro",
     "macros/blueprint-proc-macro-core",
@@ -37,13 +38,16 @@ unused_import_braces = "deny"
 pedantic = { level = "deny", priority = -1 }
 all = { level = "deny", priority = -1 }
 single_match_else = "allow"
+uninlined_format_args = "allow"
+needless_late_init = "allow"
 
 [workspace.lints.rustdoc]
 broken_intra_doc_links = "deny"
 
 [workspace.dependencies]
 gadget-io = { version = "0.0.4", path = "./gadget-io", default-features = false }
 blueprint-manager = { version = "0.1.1", path = "./blueprint-manager" }
+blueprint-serde = { version = "0.1.0", path = "./blueprint-serde", package = "gadget-blueprint-serde" }
 blueprint-test-utils = { path = "./blueprint-test-utils" }
 gadget-sdk = { path = "./sdk", default-features = false, version = "0.2.3" }
 
@@ -61,7 +65,7 @@ cargo-tangle = { path = "./cli", version = "0.2.1" }
 cargo_metadata = { version = "0.18.1" }
 
 # Tangle-related dependencies
-tangle-subxt = { version = "0.4.0", default-features = false }
+tangle-subxt = { version = "0.5.0", default-features = false }
 subxt-signer = { version = "0.37.0", default-features = false }
 subxt = { version = "0.37.0", default-features = false }
 subxt-core = { version = "0.37.0", default-features = false }
@@ -117,6 +121,7 @@ multiaddr = { version = "0.18.1", default-features = false }
 nix = { version = "0.29.0", features = ["process", "signal"] }
 num-bigint = "0.4.6"
 parking_lot = "0.12.3"
+paste = "1.0.15"
 proc-macro2 = "1.0"
 prometheus = { version = "0.13.4", default-features = false }
 quote = "1.0"
@@ -126,6 +131,7 @@ rustdoc-types = "0.31.0"
 schnorrkel = { version = "0.11.4", default-features = false, features = ["preaudit_deprecated", "getrandom"] }
 serde = { version = "1.0.208", default-features = false }
 serde_json = "1.0"
+serde_test = "1.0.177"
 sha2 = "0.10.8"
 sqlx = "=0.7.3"
 syn = "2.0.75"

blueprint-serde/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "gadget-blueprint-serde"
+version = "0.1.0"
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+homepage.workspace = true
+repository.workspace = true
+
+[dependencies]
+paste.workspace = true
+serde.workspace = true
+tangle-subxt.workspace = true
+
+[dev-dependencies]
+serde_test.workspace = true
+
+[lints]
+workspace = true
+
+[features]
+default = ["std"]
+std = []