Lifted fontstash to its own package, made packages for RFont and VEFontCache

Going to do fonstash first then rfont ports.

After will complete the VEFontCache port

code/sectr/grime/mappings.odin

@@ -127,6 +127,8 @@ import "thirdparty:backtrace"
 	stacktrace       :: backtrace.trace
 	stacktrace_lines :: backtrace.lines
 
+#region("codebase")
+
 import "codebase:grime"
 	// asserts
 	ensure :: grime.ensure
@@ -235,6 +237,8 @@ import "codebase:grime"
 
 	varena_allocator :: grime.varena_allocator
 
+#endregion("codebase")
+
 #region("Procedure overload mappings")
 
 // This has to be done on a per-module basis.