- Added initial version of the exceptionm AND error builder

Resolver

- Added `resolveWithin_Safe(Container currentContainer, string name)` which throws on an error

- Added new test cases for resolution stuff

Compiler

- Added more test cases

Pipelines

- Added more test cases

- Added `resolveBest_Safe(...)`

ResolutionError

- Added new type

- Typo fix

- Typo fix

- When resolving a `FunctionCall`'s `Function` use the safe resolver
- When resolving a `VariableExpression`'s `Variable` use the safe resolver
- When resolving the `VariableAssignmentStdAlone`'s `Variable` use the safe resolver

- Cleaned up

- `resolveWithin_Safe()` now does expected types as well

Resolver (unittests)

- Added testing for the safe resolution methods

- Added more unittests to cover last set of erroneous cases