Fix whitespace in number parsing (#3195)

* Handle input errors for --indent

Handle malformed and overflowing arguments. Also, forbid leading and
trailing spaces to match the behavior of tonumber from commit ce0e788
(improve tonumber/0 performance by parsing input as number literal,
2024-03-02).

* Do not skip leading whitespace in jvp_strtod

`jvp_strtod` skips leading whitespace, but its decnum counterpart
`decNumberFromString` (called within `jv_number_with_literal`) does not.
Those two are called interchangeably, so it leads to inconsistent
behavior depending on whether the decnum feature is enabled.
Additionally, `classify`, used in the token scanner, only considers
[ \t\n\r] to be whitespace, but `jvp_strtod` consumes the larger set
[ \t\n\v\f\r], so those extra characters are considered literals.

Changing this deviates from the behavior of `strdod` from <stdlib.h> and
is technically a breaking API change, since it is a public symbol.

tests/jq.test

@@ -2342,8 +2342,8 @@ null
 2
 
 .[] |= try tonumber
-["1", "2a", "3", " 4 ", "5.67", ".89", "-876", "+5.43", 21]
-[1, 3, 5.67, 0.89, -876, 5.43, 21]
+["1", "2a", "3", " 4", "5 ", "6.7", ".89", "-876", "+5.43", 21]
+[1, 3, 6.7, 0.89, -876, 5.43, 21]
 
 # Also 1859, but from 2073
 any(keys[]|tostring?;true)