docs: baked a lot of API docs

docs/API/encoding.md

@@ -6,4 +6,61 @@ references:
 
 The `encoding` namespace converts between strings, byte buffers, Base64, and UTF-8.
 
-${spacelua.renderApiDocumentation("encoding")}
+<!--#lua spacelua.renderApiDocumentation("encoding") -->
+## encoding.base64Decode
+
+`encoding.base64Decode(encoded)`
+
+Decodes a Base64 string into a byte buffer.
+
+**Parameters:**
+
+- `encoded` (`string`)
+
+**Returns:**
+
+- `bytes` — Decoded bytes.
+
+## encoding.base64Encode
+
+`encoding.base64Encode(data)`
+
+Encodes a string or byte buffer as Base64.
+
+**Parameters:**
+
+- `data` (`string|bytes`)
+
+**Returns:**
+
+- `string` — Base64-encoded data.
+
+## encoding.utf8Decode
+
+`encoding.utf8Decode(data)`
+
+Decodes a UTF-8 byte buffer into a string.
+
+**Parameters:**
+
+- `data` (`bytes`)
+
+**Returns:**
+
+- `string` — Decoded text.
+
+## encoding.utf8Encode
+
+`encoding.utf8Encode(value)`
+
+Encodes a UTF-8 string into a byte buffer.
+
+**Parameters:**
+
+- `value` (`string`)
+
+**Returns:**
+
+- `bytes` — UTF-8 encoded bytes.
+<!--/lua-->
+