[v3] Fix binding generator output and import paths (#3334)

* Fix relative import path computation

* Fix models output path

* Add option to generate bindings using bundled runtime

* Update binding example

* Fix testdata

* Update changelog

---------

Co-authored-by: Lea Anthony <lea.anthony@gmail.com>

v3/internal/parser/testdata/function_from_imported_package/frontend/bindings/main/GreetService.js

@@ -8,7 +8,7 @@ import {Call} from '@wailsio/runtime';
  */
 
 /**
- * Greet does XYZ 
+ * Greet does XYZ
  * @function Greet
  * @param name {string}
  * @returns {Promise<string>}
@@ -18,7 +18,7 @@ export async function Greet(name) {
 }
 
 /**
- * NewPerson creates a new person 
+ * NewPerson creates a new person
  * @function NewPerson
  * @param name {string}
  * @returns {Promise<Person>}

v3/internal/parser/testdata/function_from_imported_package/frontend/bindings/main/GreetService.name.js

@@ -8,7 +8,7 @@ import {Call} from '@wailsio/runtime';
  */
 
 /**
- * Greet does XYZ 
+ * Greet does XYZ
  * @function Greet
  * @param name {string}
  * @returns {Promise<string>}
@@ -18,7 +18,7 @@ export async function Greet(name) {
 }
 
 /**
- * NewPerson creates a new person 
+ * NewPerson creates a new person
  * @function NewPerson
  * @param name {string}
  * @returns {Promise<Person>}

v3/internal/parser/testdata/function_from_imported_package/frontend/bindings/services/OtherService.js

@@ -8,7 +8,7 @@ import {Call} from '@wailsio/runtime';
  */
 
 /**
- * Yay does this and that 
+ * Yay does this and that
  * @function Yay
  * @returns {Promise<Address>}
  **/

v3/internal/parser/testdata/function_from_imported_package/frontend/bindings/services/OtherService.name.js

@@ -8,7 +8,7 @@ import {Call} from '@wailsio/runtime';
  */
 
 /**
- * Yay does this and that 
+ * Yay does this and that
  * @function Yay
  * @returns {Promise<Address>}
  **/