Refactor CLI to use official OpenAI client (#7)

* Deprecate client packages
* Center project around CLI
* Update CLI

Author: picatz

README.md

@@ -1,117 +1,18 @@
 # OpenAI [![Go Reference](https://pkg.go.dev/badge/github.com/picatz/openai.svg)](https://pkg.go.dev/github.com/picatz/openai) [![Go Report Card](https://goreportcard.com/badge/github.com/picatz/openai)](https://goreportcard.com/report/github.com/picatz/openai) [![License: MPL 2.0](https://img.shields.io/badge/License-MPL_2.0-brightgreen.svg)](https://opensource.org/licenses/MPL-2.0) 
 
-An unofficial community-maintained Go client package and CLI for [OpenAI](https://openai.com/).
+An unofficial community-maintained CLI application for [OpenAI](https://openai.com/).
 
 ## Installation
 
-To use this package in your own Go project:
-
-```console
-$ go get github.com/picatz/openai@latest
-```
-
-To use the `openai` CLI:
-
 ```console
 $ go install github.com/picatz/openai/cmd/openai@latest
 ```
 
-<center>
-   <img src="./vhs/demo.gif"></img>
-</center>
-
 > [!IMPORTANT] 
 > To use the CLI you must have a valid `OPENAI_API_KEY` environment variable set. You can get one [here](https://platform.openai.com/).
 
 > [!TIP]
-> You can customize which model is used by setting the `OPENAI_MODEL` environment variable. The default is `gpt-4-turbo-preview` today, but it may change in the future.
-
-## Usage
-
-```go
-import "github.com/picatz/openai"
-
-client := openai.NewClient(os.Getenv("OPENAI_API_KEY"))
-```
-
-### Assistants API
-
-```go
-assistant, _ := client.CreateAssistant(ctx, &openai.CreateAssistantRequest{
-	Model:        openai.ModelGPT4TurboPreview,
-	Instructions: "You are a helpful assistant for all kinds of tasks. Answer as concisely as possible.",
-	Name:         "openai-cli-assistant",
-	Description:  "A helpful assistant for all kinds of tasks.",
-	Tools: []map[string]any{
-		{
-			"type": "code_interpreter",
-		},
-		{
-			"type": "retrieval",
-		},
-		// {
-		// 	"type": "function",
-		//  ...
-		// },
-	},
-})
-
-thread, _ := client.CreateThread(ctx, nil)
-
-client.CreateMessage(ctx, &openai.CreateMessageRequest{
-	ThreadID: thread.ID,
-	Role:     openai.ChatRoleUser,
-	Content:  input,
-})
-
-runResp, _ := client.CreateRun(ctx, &openai.CreateRunRequest{
-	ThreadID:    thread.ID,
-	AssistantID: assistant.ID,
-})
-
-openai.WaitForRun(ctx, client, thread.ID, runResp.ID, 700*time.Millisecond)
-
-listResp, _ := client.ListMessages(ctx, &openai.ListMessagesRequest{
-	ThreadID: thread.ID,
-	Limit:    1,
-})
-
-fmt.Println(listResp.Data[0].Content[0].Text())
-```
-
-### Chat API
-
-```go
-var history []openai.ChatMessage{
-	{
-		Role:    openai.ChatRoleSystem,
-		Content: "You are a helpful assistant for this example.",
-	},
-	{
-		Role:    openai.ChatRoleUser,
-		Content: "Hello!", // Get input from user.
-	},
-}
-
-resp, _ := client.CreateChat(ctx, &openai.CreateChatRequest{
-	Model: openai.ModelGPT35Turbo,
-	Messages: history,
-})
-
-fmt.Println(resp.Choices[0].Message.Content)
-// Hello how may I help you today?
-
-// Update history, summarize, forget, etc. Then repeat.
-history = appened(history, resp.Choices[0].Message)
-```
-
-### `openai` CLI
-
-Use OpenAI's chat or edit and completion features on the command-line.
-
-```console
-$ go install github.com/picatz/openai/cmd/openai@latest
-```
+> You can customize which model is used by setting the `OPENAI_MODEL` environment variable. The default is `gpt-4o` today, but it may change in the future.
 
 #### Usage
 
@@ -137,30 +38,40 @@ Use "openai [command] --help" for more information about a command.
 ```
 
 ```console
-$ openai assistant
+$ openai assistant --help
+Interact with the OpenAI API using the assistant API.
 
-Welcome to the OpenAI API CLI assistant mode!
-                                             
-WARNING: Messages and files disappear after exiting.
+This can be used to create a temporary assistant, or interact with an existing assistant.
 
-> Hello!
+Usage:
+  openai assistant [flags]
+  openai assistant [command]
+
+Examples:
+  $ openai assistant      # create a temporary assistant and start chatting
+  $ openai assistant chat # same as above
+  $ openai assistant create --name "Example" --model "gpt-4-turbo-preview" --description "..." --instructions "..." --code-interpreter --retrieval
+  $ openai assistant list
+  $ openai assistant info <assistant-id>
+  $ openai assistant chat <assistant-id>
+  $ openai assistant delete <assistant-id>
+
+Available Commands:
+  chat        Start an interactive assistant chat session
+  create      Create an assistant
+  delete      Delete an assistant
+  file        Manage assistant files
+  info        Get information about an assistant
+  list        List assistants
+  update      Update an assistant
 
-Hello there! How may I assist you today?
+Flags:
+  -h, --help   help for assistant
 
-...
+Use "openai assistant [command] --help" for more information about a command.
 ```
 
 > [!TIP]
-> If no subcommand (like `assistant` or `chat`) is provided, the CLI will default to `assistant` mode.
-
-```console
-$ openai chat
-
-Welcome to the OpenAI API CLI chat mode. Type 'exit' to quit.
-
-> Hello!
-
-Hello there! How may I assist you today?
-
-...
-```
+>
+> If provided no arguments, the CLI will default to the `assistant` command with an ephemeral session,
+> meaning messages and files will be deleted after exiting the session.