feat: refactor some methods and modules

* move uplc::ast::builder to uplc::builder
* rename aiken_lang::uplc to aiken_lang::gen_uplc
* move aiken_lang::air and aiken_lang::builder to aiken_lang::gen_uplc
  as submodules

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

crates/aiken-project/src/blueprint/mod.rs

@@ -4,7 +4,7 @@ pub mod schema;
 pub mod validator;
 
 use crate::{config::Config, module::CheckedModules};
-use aiken_lang::uplc::CodeGenerator;
+use aiken_lang::gen_uplc::CodeGenerator;
 use definitions::{Definitions, Reference};
 use error::Error;
 use schema::{Annotated, Schema};

crates/aiken-project/src/blueprint/validator.rs

@@ -6,7 +6,7 @@ use super::{
 use crate::module::{CheckedModule, CheckedModules};
 use aiken_lang::{
     ast::{TypedArg, TypedFunction, TypedValidator},
-    uplc::CodeGenerator,
+    gen_uplc::CodeGenerator,
 };
 use miette::NamedSource;
 use serde;
@@ -187,8 +187,9 @@ mod test {
     use aiken_lang::{
         self,
         ast::{ModuleKind, Tracing, TypedDataType, TypedFunction},
-        builder::{DataTypeKey, FunctionAccessKey},
-        builtins, parser,
+        builtins,
+        gen_uplc::builder::{DataTypeKey, FunctionAccessKey},
+        parser,
         tipo::TypeInfo,
         IdGenerator,
     };

crates/aiken-project/src/lib.rs

@@ -19,8 +19,8 @@ use crate::blueprint::{
 };
 use aiken_lang::{
     ast::{Definition, Function, ModuleKind, Tracing, TypedDataType, TypedFunction},
-    builder::{DataTypeKey, FunctionAccessKey},
     builtins,
+    gen_uplc::builder::{DataTypeKey, FunctionAccessKey},
     tipo::TypeInfo,
     IdGenerator,
 };

crates/aiken-project/src/module.rs

@@ -4,10 +4,12 @@ use aiken_lang::{
         DataType, Definition, Located, ModuleKind, TypedDataType, TypedFunction, TypedModule,
         TypedValidator, UntypedModule,
     },
-    builder::{DataTypeKey, FunctionAccessKey},
+    gen_uplc::{
+        builder::{DataTypeKey, FunctionAccessKey},
+        CodeGenerator,
+    },
     parser::extra::{comments_before, Comment, ModuleExtra},
     tipo::TypeInfo,
-    uplc::CodeGenerator,
 };
 use indexmap::IndexMap;
 use petgraph::{algo, graph::NodeIndex, Direction, Graph};