Amalgamate Entra ID NEWS items and add myself to Authors (#279)

This commit attempts to write a more holistic NEWS entry for all of the
Azure auth-related work so it's more clear to users what has happened.

Signed-off-by: Aaron Jacobs <[email protected]>

DESCRIPTION

@@ -4,6 +4,7 @@ Version: 0.1.0.9000
 Authors@R: c(
     person("Hadley", "Wickham", , "[email protected]", role = c("aut", "cre")),
     person("Joe", "Cheng", role = "aut"),
+    person("Aaron", "Jacobs", role = "aut"),
     person("Posit Software, PBC", role = c("cph", "fnd"))
   )
 Description: Chat with large language models from a range of providers

NEWS.md

@@ -12,8 +12,14 @@
 
 * `chat_openai()` should be less likely to timeout when not streaming chat results (#213).
 
-* `chat_azure()` now has a `credentials` argument to make authentication against
-  Azure more flexible (#248, @atheriel).
+* Support for Azure Entra ID authentication in `chat_azure()` has improved
+  greatly. API keys are now optional and we can pick up on ambient credentials
+  from Azure service principals or attempt to use interactive Entra ID
+  authentication when possible. The broken-by-design `token` argument has been
+  deprecated (it could not handle refreshing tokens properly), but a new
+  `credentials` argument can be used for custom Entra ID support when needed
+  instead (for instance, if you're trying to use tokens generated by the
+  `AzureAuth` package) (#248, #263, #273, #257, @atheriel).
 
 * `chat_databricks()` now handles the `DATABRICKS_HOST` environment variable
   correctly whether it includes an HTTPS prefix or not (#252, @atheriel).
@@ -26,22 +32,13 @@
   API](https://docs.snowflake.com/en/user-guide/snowflake-cortex/cortex-llm-rest-api)
   (#258, @atheriel).
 
-* `chat_azure()` now picks up credentials from Azure service principals
-  automatically (#263, @atheriel).
-
 * `chat_azure()` now reports better error messages when the underlying HTTP
   requests fail (#269, @atheriel).
 
 * `chat_cortex()` has been renamed `chat_cortex_analyst()` to better
   disambiguate it from `chat_snowflake()` (which *also* uses "Cortex") (#275,
   @atheriel).
 
-* The `token` argument to `chat_azure()` has been deprecated. Use ambient
-  credentials or the `credentials` argument instead (#257, @atheriel).
-
-* `chat_azure()` attempts to use interactive Entra ID authentication if no other
-  credentials are available (#273, @atheriel).
-
 # ellmer 0.1.0
 
 * New `chat_vllm()` to chat with models served by vLLM (#140).