fix: make requirements.txt a SampleFile so it persists

We are not bringing this file under projen management, so TextFile is an inappropriate choice
partially fulfills #16

src/files/__init__.py

@@ -13,15 +13,15 @@
 }
 
 class HelloWorldSkill(OVOSSkill):
-    def __init__(self, *args, **kwargs):
+    def __init__(self, *args, bus=None, **kwargs):
         """The __init__ method is called when the Skill is first constructed.
         Note that self.bus, self.skill_id, self.settings, and
         other base class settings are only available after the call to super().
 
         This is a good place to load and pre-process any data needed by your
         Skill, ideally after the super() call.
         """
-        super().__init__(*args, **kwargs)
+        super().__init__(*args, bus=bus, **kwargs)
         self.learning = True
 
     def initialize(self):

src/index.ts

@@ -212,10 +212,10 @@ ${line}`;
     }
     if (existsSync('requirements.txt')) {
       const existingRequirements = readFileSync('requirements.txt').toString();
-      requirements = `${existingRequirements}\n${manifestReqs ?? ''}${requirements}`;
+      requirements = `${existingRequirements}\n${manifestReqs ?? ''}\n${requirements}`;
     } else {
-      new TextFile(this, 'requirements.txt', {
-        lines: [...requirements.split('\n'), ...manifestReqs.split('\n')],
+      new SampleFile(this, 'requirements.txt', {
+        contents: requirements + '\n' + manifestReqs,
       });
     }
     if (!existsSync('version.py') && retrofit) {

test/OVOSSkillProject.test.ts

@@ -11,6 +11,8 @@ test('snapshot', () => {
 
   const synth = Testing.synth(project);
   expect(synth).toMatchSnapshot();
+  expect(synth['requirements.txt']).toBeDefined();
+  expect(synth['requirements.txt']).toContain('ovos-utils\novos-bus-client\novos-workshop');
 });
 
 test('snapshot retrofit', () => {
@@ -23,6 +25,8 @@ test('snapshot retrofit', () => {
 
   const synth = Testing.synth(project);
   expect(synth).toMatchSnapshot();
+  expect(synth['requirements.txt']).toBeDefined();
+  expect(synth['requirements.txt']).toContain('ovos-utils\novos-bus-client\novos-workshop');
 
   rmSync('TODO.md');
 });
@@ -42,6 +46,10 @@ test('snapshot retrofit with manifest.yml', () => {
 
   const synth = Testing.synth(project);
   expect(synth).toMatchSnapshot();
+  expect(synth['requirements.txt']).toBeDefined();
+  expect(synth['requirements.txt']).toContain('akinator');
+  expect(synth['requirements.txt']).toContain('rapidfuzz');
+  expect(synth['requirements.txt']).toContain('ovos-utils\novos-bus-client\novos-workshop');
 
   rmSync('manifest.yml');
   rmSync('TODO.md');