Refactor parser

v0/tests/parser_alias_and_import_mix.c2

@@ -2,8 +2,8 @@ module mymodule;
 
 import foo;
 
-alias myalias = int32[];
+alias myalias = i32[];
 
 import bar;
 
-alias otheralias = int32;
+alias otheralias = i32;

v0/tests/parser_alias_array.c2

@@ -1,3 +1,3 @@
 module mymodule;
 
-alias myalias = int32[];
+alias myalias = i32[];

v0/tests/parser_alias_simple.c2

@@ -1,3 +1,3 @@
 module mymodule;
 
-alias myalias = int32;
+alias myalias = i32;

v0/tests/parser_bad_import_name.log

@@ -1,4 +1,4 @@
 --- v0/tests/parser_bad_import_name.c2 ---
 1| import ;
    ^^^^^^
-   expected 'module' keyword
+   expected keyword 'module'

v0/tests/parser_bad_module_name.log

@@ -1,4 +1,4 @@
 --- v0/tests/parser_bad_module_name.c2 ---
 1| import other_module;
    ^^^^^^
-   expected 'module' keyword
+   expected keyword 'module'

v0/tests/tokenstream_primitive_types.c2

@@ -0,0 +1 @@
+i8 i16 i32 i64 u8 u16 u32 u64