aichat 0.21.0

[BrewTestBot]

Created by brew bump

---

Created with brew bump-formula-pr.

release notes

## Break Changing
Replace roles.yaml with roles/<name>.md (see #804)
Migrate ollama/qianwen/cloudflare clients to openai-compatible
clients:

-  - type: ollama
-    api_base: http://localhost:11434
+  - type: openai-compatible
+    name: ollama
+    api_base: http://localhost:11434/v1

-  - type: qianwen
+  - type: openai-compatible
+    name: qianwen

-  - type: cloudflare
-    account_id: xxx
-    api_base: https://api.cloudflare.com/client/v4
+  - type: openai-compatible
+    name: cloudflare
+    api_base: https://api.cloudflare.com/client/v4/accounts/{ACCOUNT_ID}/ai/v1
Clients Changes

migrate ollama to openai-compatible
migrate qianwen to openai-compatible
migrate cloudflare to openai-compatible
add github
add ai21
add huggingface

New Features

support builtin website crawling (recursive_url) (#786)
no check model's support for function calls (#791)
enable custom api_base for most clients (#793)
support github client (#798)
support ai21 client (#800)
replace roles.yaml with roles/<name>.md (#810)
save temp session with temp-<timestamp> if save_session: true (#811)
webui use querystring as settings (#814)
webui support RAG (#815)
migrate ollama/qianwen clients to openai-compatible (#816)
migrate cloudflare client to openai-compatible (#821)
add huggingface client (#822)
use dynamic batch size for embedding (#826)

Bug Fixes

incorrect function call handling with session in non-REPL (#777)
claude fails to run tools with zero arguments (#780)
invalid model error while switching roles if the model_id is same to current (#788)
incomplete stream response in proxy LLM api (#796)

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