* Adds C Interop documentation for Strings
* Replaces usage of triple backticks with single when used in a paragraph
* Adds link to new C Interop docs in the Language Guide
* Small tweaks to wording in C Interop doc
* Adds Array section to C Interop doc
* Adds deftemplate examples in C interop doc
* Small copy change in C interop doc
* Adds identifiers section in C interop doc