RFC Cleanup Configuration and naming

The initialization code is really verbose - configuration can just be an object & be initialized directly with LastMile

Currently:
```javascript
import { Configuration, LastMileAIApi} from "lastmileai";

const configuration = new Configuration({
  apiKey: process.env.LASTMILEAI_API_KEY ?? "",
});
const lastmile = new LastMileAIApi(configuration);

const completion = await lastmile.createOpenAICompletion({
  completionParams: {
    model: "text-davinci-003",
    prompt: "Your prompt here",
  },
  embeddingCollectionId: "clfpqyvpp004npmzgp1d4j4fw",
});
```

Can become:
```javascript
import { LastMile } from "lastmileai";

const lastmile = new LastMile({apiKey: process.env.LASTMILEAI_API_KEY ?? ""});

const completion = await lastmile.createOpenAICompletion({
  completionParams: {
    model: "text-davinci-003",
    prompt: "Your prompt here",
  },
  embeddingCollectionId: "clfpqyvpp004npmzgp1d4j4fw",
});
```

README.md

@@ -19,13 +19,9 @@ npm install lastmileai
 This library needs to be configured with your API Token (aka API key) obtained above. You can store the API key in an environment variable or alternative secure storage that can be accessed in your server-side code. For example, to initialize the library with the API key loaded from environment variable:
 
 ```javascript
-import { Configuration, LastMileAIApi } from "lastmileai";
+import { LastMile } from "lastmileai";
 
-const configuration = new Configuration({
-    apiKey: process.env.LASTMILEAI_API_KEY ?? "",
-});
-
-const lastmile = new LastMileAIApi(configuration);
+const lastmile = new LastMile({apiKey: process.env.LASTMILEAI_API_KEY ?? ""});
 ```
 
 ## Completions -- Open AI Models

api.ts

@@ -7,6 +7,7 @@ import {
 } from "openai";
 import { JSONArray, JSONValue } from "./common";
 import { Configuration } from "./configuration";
+import packageJson = require("./package.json");
 
 /**
  * GENERAL TYPES
@@ -2293,16 +2294,27 @@ export type UpdateWorkspaceResponse = Workspace;
  */
 
 /**
- * LastMileAIApi - API for interfacing with LastMileAI
+ * LastMile - API for interfacing with LastMileAI
  * @export
- * @class LastMileAIApi
+ * @class LastMile
  */
-export class LastMileAIApi {
+export class LastMile {
   protected configuration: Configuration;
   protected defaultHeaders: undefined;
 
   constructor(configuration: Configuration) {
     this.configuration = configuration;
+    if (!this.configuration.defaultAxiosConfig) {
+      this.configuration.defaultAxiosConfig = {
+        baseURL: 'https://lastmileai.dev/api/',
+            headers: {
+                'User-Agent': `LastMileAI/NodeJS/${packageJson.version}`,
+                'Accept': 'application/json',
+                'Content-Type': 'application/json',
+                'Authorization': `Bearer ${this.configuration.apiKey}`,
+            }
+      };
+    }
   }
 
   /**

configuration.ts

@@ -1,11 +1,10 @@
 import { AxiosRequestConfig } from "axios";
-import packageJson = require("./package.json");
 
 export interface ConfigurationParameters {
     apiKey: string;
 }
 
-export class Configuration {
+export type Configuration = {
     /**
      * LastMileAI API Key
      * @memberof Configuration
@@ -17,17 +16,4 @@ export class Configuration {
      * @memberof Configuration
      */
     defaultAxiosConfig: AxiosRequestConfig;
-
-    constructor(param: ConfigurationParameters) {
-        this.apiKey = param.apiKey;
-        this.defaultAxiosConfig = {
-            baseURL: 'https://lastmileai.dev/api/',
-            headers: {
-                'User-Agent': `LastMileAI/NodeJS/${packageJson.version}`,
-                'Accept': 'application/json',
-                'Content-Type': 'application/json',
-                'Authorization': `Bearer ${this.apiKey}`,
-            }
-        };
-    }
-}
+}