feat(codegen): support multi-validators

* rename force_wrap to force
* add a bunch of builder methods to Term<Name>
* refactor one tiny location to show off builder methods
* split generate into `generate` and `generate_test`
* create wrap_as_multi_validator function

Co-authored-by: Kasey White <kwhitemsg@gmail.com>

examples/acceptance_tests/script_context/validators/deploy.ak

@@ -5,8 +5,8 @@ use aiken/list
 use aiken/transaction.{DatumHash, InlineDatum, ScriptContext}
 use aiken/transaction/credential.{Inline, VerificationKeyCredential}
 
-validator spend {
-  fn(datum: Data, _redeemer: Data, ctx: ScriptContext) {
+validator {
+  fn spend(datum: Data, _redeemer: Data, ctx: ScriptContext) {
     [
       assert_datum(datum),
       assert_datums(ctx.transaction.datums),