The AST was normally added as a non-enumerable property, `type.parsedType`, which caused many complications; most recently, I noticed that doclets don't retain this property when `DocletStore` proxies them. Better to just add the original type expression as `type.expression` and let templates parse it again as needed.
These changes enable templates to use the logging functions even if they're not installed in the same `node_modules` directory as JSDoc.
Includes API changes to various modules and functions that didn't have access to the dependency object. Most notably, you now call a function to retrieve tag definitions, rather than just using an exported object as-is.
