Implement try_get detector for mappings

[matiascabello]

Description

The method get or the following variants might cause the contract to panic on a Map:

• get panics if the value corresponding to the key cannot be converted to type V.
• get_unchecked panics if the map does not contain a value with the specified key or if the value corresponding to the key cannot be converted to type V
• try_get_unchecked panics if the map does not contain a value with the specified key.

When using externally provided Maps as contract function arguments, there's no guarantee that entries will match the expected key (K) and value (V) types. To ensure type safety and avoid runtime errors, validate all entries before storage or when accessing them using try_ variant.