build: update dependencies, remove strum, add reqwest multipart

- Bump thiserror 1.x → 2.x
- Remove strum (no longer needed after Model enum replacement)
- Add reqwest multipart feature for file upload support
- Relax version pins to semver ranges
- Bump package version to 1.0.0

Cargo.toml

@@ -2,7 +2,7 @@
 name = "mistralai-client"
 description = "Mistral AI API client library for Rust (unofficial)."
 license = "Apache-2.0"
-version = "0.14.0"
+version = "1.0.0"
 
 edition = "2021"
 rust-version = "1.76.0"
@@ -15,18 +15,17 @@ readme = "README.md"
 repository = "https://github.com/ivangabriele/mistralai-client-rs"
 
 [dependencies]
-async-stream = "0.3.5"
-async-trait = "0.1.77"
-env_logger = "0.11.3"
-futures = "0.3.30"
-log = "0.4.21"
-reqwest = { version = "0.12.0", features = ["json", "blocking", "stream"] }
-serde = { version = "1.0.197", features = ["derive"] }
-serde_json = "1.0.114"
-strum = "0.26.1"
-thiserror = "1.0.57"
-tokio = { version = "1.36.0", features = ["full"] }
-tokio-stream = "0.1.14"
+async-stream = "0.3"
+async-trait = "0.1"
+env_logger = "0.11"
+futures = "0.3"
+log = "0.4"
+reqwest = { version = "0.12", features = ["json", "blocking", "stream", "multipart"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+thiserror = "2"
+tokio = { version = "1", features = ["full"] }
+tokio-stream = "0.1"
 
 [dev-dependencies]
-jrest = "0.2.3"
+jrest = "0.2"