fix(ios): reduced TitaniumKit build warnings & fixed TiBlob crash

[hbugdoll]

Related to https://github.com/tidev/titanium-sdk/issues/14290. Edit: Also fixes https://github.com/tidev/titanium-sdk/issues/14306.

Description

Removed over 40 warnings during TitaniumKit build process:

• Class method not found warnings
  • +resourceBasedURL:baseURL: in iphone/TitaniumKit/TitaniumKit/Sources/API/ScriptModule.m
    • added missing header file
• Instance method not found warnings
  • -JSValueInContext: in iphone/TitaniumKit/TitaniumKit/Sources/API/KrollModule.m
    • added explicit cast
  • -applyProperties: in iphone/TitaniumKit/TitaniumKit/Sources/API/TiProxy.h
    • added to header file
• Incompatible pointer types warnings
  • JSValueRef * vs. JSValueRef _Null_unspecified in iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m
    • use of JSValueRef, which is already a pointer (Edit: crash relevant)
    • added explicit initialization of JSValueRef
    • BTW removed unused JSValueRef *
  • CAShapeLayer * vs. CALayer * in iphone/TitaniumKit/TitaniumKit/Sources/API/TiUIView.m
    • added explicit cast
• Receiver is a forward class and corresponding interface may not exist warnings
  • TiHost in iphone/TitaniumKit/TitaniumKit/Sources/API/ScriptModule.m
    • added missing header file
• Receiver type warnings
  • NSUncaughtExceptionHandler * in iphone/TitaniumKit/TitaniumKit/Sources/API/TiExceptionHandler.m
    • added explicit cast
• Enumeration value not handled in switch warnings
  • TiBlobTypeSystemImage in iphone/TitaniumKit/TitaniumKit/Sources/API/TiBlob.m
    • added missing default case