[feat] more informative error message

[ngupta23]

Description

Sometimes, users receive this error message.

ValueError: Series contain missing or duplicate timestamps, or the timestamps do not match the provided frequency.

Since there are several things that this mentions, it would be great if we could somehow figure out the exact root cause and only mention that.

If that is not possible, it would be great to include links to tutorials to fix each individual problem in the error message so users can fix the issue fast.

Use case

No response

[jmoralez]

The full error message has that:

nixtla/nixtla/nixtla_client.py

Lines 940 to 945 in e96df1f

	"Series contain missing or duplicate timestamps, or the timestamps "
	"do not match the provided frequency.\n"
	"Please make sure that all series have a single observation from the first "
	"to the last timestamp and that the provided frequency matches the timestamps'.\n"
	"You can refer to https://docs.nixtla.io/docs/tutorials-missing_values "
	"for an end to end example."