[App] Moved app.py to root dir for lightning init app <app_name> template (#13853)

* Moved app.py to main app directory

* updated docs

* updated changelog

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: thomas chaton <[email protected]>
Co-authored-by: Jirka Borovec <[email protected]>

Author: 4 people

docs/source-app/workflows/build_lightning_app/from_scratch_content.rst

@@ -87,10 +87,10 @@ You'll see a print-out like this:
         /Users/Your/Current/dir/your-app-name
 
     run your app with:
-        lightning run app your-app-name/your_app_name/app.py
+        lightning run app your-app-name/app.py
 
     run it on the cloud to share with your collaborators:
-        lightning run app your-app-name/your_app_name/app.py --cloud
+        lightning run app your-app-name/app.py --cloud
 
 ----
 

src/lightning_app/CHANGELOG.md

@@ -48,6 +48,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Resolved a bug where the install command was not installing the latest version of an app/component by default ([#14181](https://github.com/Lightning-AI/lightning/pull/14181))
 
 
+- Unification of app template: moved `app.py` to root dir for `lightning init app <app_name>` template ([#13853](https://github.com/Lightning-AI/lightning/pull/13853))
+
+
 ## [0.5.5] - 2022-08-9
 
 ### Deprecated

src/lightning_app/cli/app-template/placeholdername/app.py renamed to src/lightning_app/cli/app-template/app.py

@@ -19,10 +19,10 @@ def app(app_name):
     {new_resource_name}
 
     run your app with:
-        lightning run app {app_name}/{name_for_files}/app.py
+        lightning run app {app_name}/app.py
 
     run it on the cloud to share with your collaborators:
-        lightning run app {app_name}/{name_for_files}/app.py --cloud
+        lightning run app {app_name}/app.py --cloud
     """
     logger.info(m)