print out error fields on log lines

[ghost]

• always log the error message
• with --verbose, also log the stack trace (if available)

This resolves #195. This does not touch panics.

Here's an example with and without --verbose. I added three log lines, each with a stack trace: one at info, one at warn, one at error.

Without verbose:

With verbose:

Standard checks

• Unit tests: unit tests added
• Docs: no docs needed
• Backwards compatibility: no issues

[github-actions]

Package	Line Rate	Health
github.com/klothoplatform/klotho/pkg/analytics	3%	❌
github.com/klothoplatform/klotho/pkg/annotation	23%	❌
github.com/klothoplatform/klotho/pkg/cli	4%	❌
github.com/klothoplatform/klotho/pkg/core	21%	❌
github.com/klothoplatform/klotho/pkg/env_var	82%	✔
github.com/klothoplatform/klotho/pkg/exec_unit	54%	➖
github.com/klothoplatform/klotho/pkg/infra/kubernetes	59%	➖
github.com/klothoplatform/klotho/pkg/infra/kubernetes/helm	39%	❌
github.com/klothoplatform/klotho/pkg/input	72%	➖
github.com/klothoplatform/klotho/pkg/lang	38%	❌
github.com/klothoplatform/klotho/pkg/lang/dockerfile	0%	❌
github.com/klothoplatform/klotho/pkg/lang/golang	36%	❌
github.com/klothoplatform/klotho/pkg/lang/javascript	48%	❌
github.com/klothoplatform/klotho/pkg/lang/python	63%	➖
github.com/klothoplatform/klotho/pkg/lang/yaml	0%	❌
github.com/klothoplatform/klotho/pkg/logging	23%	❌
github.com/klothoplatform/klotho/pkg/multierr	95%	✔
github.com/klothoplatform/klotho/pkg/provider/aws	50%	➖
github.com/klothoplatform/klotho/pkg/provider/aws/resources	70%	➖
github.com/klothoplatform/klotho/pkg/runtime	78%	✔
github.com/klothoplatform/klotho/pkg/static_unit	33%	❌
github.com/klothoplatform/klotho/pkg/updater	30%	❌
github.com/klothoplatform/klotho/pkg/validation	74%	➖
github.com/klothoplatform/klotho/pkg/yaml_util	79%	✔
Summary	43% (4253 / 9927)	❌