add todo list

README.md

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 # Data Tools
 
 Modular data conversion tools (for developers)
+
+## TODO:
+
+[ ] zooming
+[ ] typed values
+[ ] implicit type conversion
+[ ] explicit type converters (eg. number to text with specified precision)
+[ ] connector error state when receiving invalid type or inconvertible value (eg. invalid base64 string)
+[ ] color coding typed connectors (remove input/output color coding)
+[ ] color code explanation
+[ ] copy button for text boxes
+[ ] connect and disconnect listeners for connectors
+[ ] connector value caching
+[ ] lock text box when an input is connected
+[ ] cycle prevention detection
+[ ] random number generator
+[ ] url encoder / decoder
+[ ] binary encoder (hex, binary)
+[ ] module loader
+[ ] md5 hasher
+[ ] sha256 hasher
+[ ] saving and loading configurations to local storage
+[ ] saving and loading configurations to local file
+[ ] presets fetaure
+[ ] presets for all converters
+[ ] preset for random number generator
+[ ] array type
+[ ] array splitters / concatinators
+[ ] convert network to code