Key functions implemented in the library:

• JSONToTOON(string jsonInput, int indentSize = 2): converts a JSON string to the TOON textual format. Returns empty string for empty input.
• TOONToJSON(string toonInput, int indentSize = 2): converts TOON back to JSON. Uses Newtonsoft.Json to serialize mixed object graphs.
• EstimateTokens(string text): crude token estimate (approx. 1 token ˜ 4 chars).
• JSONToTOONWithStats(string jsonInput, int indentSize = 2): returns TOON output plus estimated token counts and savings in a ConversionResult structure.