func create gives unclear guidance when --language flag is missing #3015
Description
Current behavior:
When running func create without the required --language flag, the error message is quite technical and may be confusing for beginners,
see here
Error: Required flag "language" not set.
Available language runtimes are:
go
node
python
quarkus
rust
springboot
typescript
Proposed improvement:
Make the error message more user-friendly and helpful something like this :
Error: Missing required language
You need to specify which programming language to use.
Choose from these options:
go
node
python
quarkus
rust
springboot
typescript
Example:
func create --language python myfunction
Run 'func languages' to see detailed language information.