feat: add embedchain javascript package (#576)

embedchain-js/embedchain/models/ChunkResult.ts

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+import type { Metadata } from './Metadata';
+
+export type ChunkResult = {
+  documents: string[];
+  ids: string[];
+  metadatas: Metadata[];
+};

embedchain-js/embedchain/models/DataDict.ts

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+import type { ChunkResult } from './ChunkResult';
+
+type Data = {
+  doc: ChunkResult['documents'][0];
+  meta: ChunkResult['metadatas'][0];
+};
+
+export type DataDict = {
+  [id: string]: Data;
+};

embedchain-js/embedchain/models/DataType.ts

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+export type DataType = 'pdf_file' | 'web_page' | 'qna_pair';

embedchain-js/embedchain/models/FormattedResult.ts

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+import type { Document } from 'langchain/document';
+
+export type FormattedResult = [Document, number | null];

embedchain-js/embedchain/models/Input.ts

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+import type { QnaPair } from './QnAPair';
+
+export type RemoteInput = string;
+
+export type LocalInput = QnaPair;
+
+export type Input = RemoteInput | LocalInput;

embedchain-js/embedchain/models/LoaderResult.ts

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+import type { Metadata } from './Metadata';
+
+export type LoaderResult = { content: any; metaData: Metadata }[];

embedchain-js/embedchain/models/Metadata.ts

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+export type Metadata = {
+  url: string;
+};

embedchain-js/embedchain/models/Method.ts

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+export type Method = 'init' | 'query' | 'add' | 'add_local';

embedchain-js/embedchain/models/QnAPair.ts

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+type Question = string;
+type Answer = string;
+
+export type QnaPair = [Question, Answer];

embedchain-js/embedchain/models/index.ts

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+import { DataDict } from './DataDict';
+import { DataType } from './DataType';
+import { FormattedResult } from './FormattedResult';
+import { Input, LocalInput, RemoteInput } from './Input';
+import { LoaderResult } from './LoaderResult';
+import { Metadata } from './Metadata';
+import { Method } from './Method';
+import { QnaPair } from './QnAPair';
+
+export {
+  DataDict,
+  DataType,
+  FormattedResult,
+  Input,
+  LoaderResult,
+  LocalInput,
+  Metadata,
+  Method,
+  QnaPair,
+  RemoteInput,
+};