feat: Add Mistral model support to strands (strands-agents#284)

* feat: add Mistral model support to strands

* fix: testcase and better error handling

* fix: Minor doc update

Author: siddhantwaghjale

pyproject.toml

@@ -70,6 +70,9 @@ litellm = [
 llamaapi = [
     "llama-api-client>=0.1.0,<1.0.0",
 ]
+mistral = [
+    "mistralai>=1.8.2",
+]
 ollama = [
     "ollama>=0.4.8,<1.0.0",
 ]
@@ -92,7 +95,7 @@ a2a = [
 source = "vcs"
 
 [tool.hatch.envs.hatch-static-analysis]
-features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel"]
+features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel","mistral"]
 dependencies = [
   "mypy>=1.15.0,<2.0.0",
   "ruff>=0.11.6,<0.12.0",
@@ -116,7 +119,7 @@ lint-fix = [
 ]
 
 [tool.hatch.envs.hatch-test]
-features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel"]
+features = ["anthropic", "litellm", "llamaapi", "ollama", "openai", "otel","mistral"]
 extra-dependencies = [
     "moto>=5.1.0,<6.0.0",
     "pytest>=8.0.0,<9.0.0",
@@ -132,7 +135,7 @@ extra-args = [
 
 [tool.hatch.envs.dev]
 dev-mode = true
-features = ["dev", "docs", "anthropic", "litellm", "llamaapi", "ollama", "otel"]
+features = ["dev", "docs", "anthropic", "litellm", "llamaapi", "ollama", "otel","mistral"]
 
 [tool.hatch.envs.a2a]
 dev-mode = true