Support for parameterized urls in the AppDirectory and Desktop Agent

## Enhancement Request
Being able to have the record in the app directory that would have the part that would be replaced dynamically by the desktop agent with the context. For example,
"https://example.com/{{context}}" or "https://example.com?context={{context}}"

### Use Case:
Being able to use deep links provided by the application to launch different pages of the application

### Workflow Description
App A will send the request to essentially open with context, and if the url is parametrized, then in the app directory, then instead of doing the current workflow, it would replace the part of the url and launch it that way

Start by locating the AppDirectory and Desktop Agent entry points that handle application URLs and context-based launches. Trace the current launch workflow, then define how {{context}} is substituted for both path and query URLs; done means the resulting deep link opens the requested application page with the supplied context.

Written by the indexing model from the issue text.