Implement Proxied Content (dynamic variables)

[shah]

Create proxied content infuse and interpolate (PCII) Markdown directive for including dynamic content from modules. This directive is called PCII because content is proxied (delegated from somewhere else), is infused (included) into the current text stream, and is (optionally) interpolated dynamically if the symbol is a function.

Spec:

:pcii[symbol]                                 find first instance of symbol in any module
:pcii[symbol]{module="module.ts"}             if module.ts is unique across all folders
:pcii[symbol]{module="path/path/module.ts"}   if module.ts is found in multiple paths

where symbol is the name of an exported variable or function in path/path/module.ts.

[shah]

• [ ] Add context="client" or similar to :pcii[symbol]{context="client"} so that the variable will be injected in the browser instead of at built time. The default context is server or build.
• [ ] Add PCII web components to drive proxied content infusion and interpolation in HTML. Perhaps the bundled *.client.pcii.ts output could include web component in the bundled Javascript file?

[shah]

We also need to add the ability for directives to be recursively rendered in case the result of PCII content has Markdown.