Update to latest Mistral AI API (v1.0.0)

- Replace closed Model enum with flexible string-based Model type
  with constructor methods for all current models (Mistral Large 3,
  Small 4, Magistral, Codestral, Devstral, Pixtral, Voxtral, etc.)
- Add new API endpoints: FIM completions, Files, Fine-tuning, Batch
  jobs, OCR, Audio transcription, Moderations/Classifications, and
  Agent completions (sync + async for all)
- Add new chat fields: frequency_penalty, presence_penalty, stop,
  n, parallel_tool_calls, reasoning_effort, min_tokens, json_schema
  response format
- Add embedding fields: output_dimension, output_dtype
- Tool parameters now accept raw JSON Schema (serde_json::Value)
  instead of limited enum types
- Add tool call IDs and Required tool choice variant
- Add DELETE HTTP method support and multipart file upload
- Bump thiserror to v2, add reqwest multipart feature
- Remove strum dependency (no longer needed)
- Update all tests and examples for new API

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"