feat: improve tool output json markdown format

[MQ37]

related to #282

Improved the output format by wrapping JSON in the backtick JSON markdown block (as per JC's feedback)

[jirispilka]

Thanks! But le'ts not use indent:

JSON.stringify(datasets, null, 2)

For some reason it cost almost double of the tokens: #283 (comment)

"On real data from Google map, JSON to markdown is 11% smaller for normal JSON (JSON.stringify without formatting params) and 44% smaller than formatted JSON JSON.stringify(json, null, 2)"

[MQ37]

Thanks! But le'ts not use indent:

JSON.stringify(datasets, null, 2)

For some reason it cost almost double of the tokens: #283 (comment)

"On real data from Google map, JSON to markdown is 11% smaller for normal JSON (JSON.stringify without formatting params) and 44% smaller than formatted JSON JSON.stringify(json, null, 2)"

Makes sense, thank you for noting this. Changed to JSON.stringify(obj) only.