update(docs): add api-extractor

Author: pragmatos

.gitignore

@@ -1,6 +1,8 @@
 /node_modules
 coverage
 dist
+docs
+temp
 .DS_Store
 .idea
 .vscode

config/api-extractor.json

@@ -0,0 +1,21 @@
+{
+	"$schema": "https://developer.microsoft.com/json-schemas/api-extractor/v7/api-extractor.schema.json",
+	"apiReport": {
+		"enabled": true,
+		"reportFolder": "../temp",
+		"reportTempFolder": "../temp"
+	},
+
+	"docModel": {
+		"enabled": true,
+		"apiJsonFilePath": "../temp/<unscopedPackageName>.api.json"
+	},
+
+	"dtsRollup": {
+		"enabled": false
+	},
+	"tsdocMetadata": {
+		"enabled": false
+	},
+	"mainEntryPointFilePath": "<projectFolder>/dist/types/index.d.ts"
+}