refactor: clean up imports and enhance error handling

- Remove multiple unused imports
- Change `is_running` to return `!bool`
- Update `is_running` calls to handle result type

lib/data/encoderhero/decoder.v

@@ -1,8 +1,6 @@
 module encoderhero
 
-import time
 import freeflowuniverse.herolib.data.paramsparser
-import freeflowuniverse.herolib.core.texttools
 
 pub struct Decoder[T] {
 pub mut:

lib/data/encoderhero/encoder.v

@@ -4,7 +4,6 @@ import freeflowuniverse.herolib.data.paramsparser
 import time
 import v.reflection
 import freeflowuniverse.herolib.data.ourtime
-import freeflowuniverse.herolib.core.texttools
 // import freeflowuniverse.herolib.ui.console
 
 // Encoder encodes the an `Any` type into HEROSCRIPT representation.

lib/data/encoderhero/types.v

@@ -1,7 +1,5 @@
 module encoderhero
 
-import time
-
 // byte array versions of the most common tokens/chars to avoid reallocations
 const null_in_bytes = 'null'