Add T() wrapper for string literals in CallExprs

[#71156874]
Refactor inserTFuncCall switch statement cases

[#71156874]
Handle strings in declaration and assignment statments

[#71156874]
Handle composite literals with strings in them

[#71156874]
Handle KeyValueExpr with string literals inside

[#71156874]
Rewrite strings in return statements

[#71156874]
supporting -d -r flags
[#71156874]