feat(ts): Aspects example

[fosterdrummer]

Fixes #962

Adding an example implementation and application of an Aspect.

The sample project implements an aspect that does the following:

• Sets a default ReservedConcurrentExecutions property in lambda functions across a scope if the property is null/undefined.
• Logs construct paths and actions taken to give users an idea of the aspect's behavior.

Code comments and documentation are added to provide context around how aspects work and steps to implement a custom aspect.

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