Add directory structure with .gitkeep files

- Add .gitkeep files to ensure all essential directories are tracked by git
- Update .gitignore to allow .gitkeep files in logs/ and docs/generated/
- Preserve directory structure for Ralph project template system
- Directories added: src/, examples/, specs/stdlib/, templates/specs/,
  logs/, docs/generated/

This ensures the complete Ralph project structure is available when
cloning the repository, even before any actual project files are created.

.gitignore

@@ -5,11 +5,13 @@
 status.json
 
 # Logs
-logs/
+logs/*
+!logs/.gitkeep
 *.log
 
 # Generated documentation
-docs/generated/
+docs/generated/*
+!docs/generated/.gitkeep
 
 # OS files
 .DS_Store

docs/generated/.gitkeep

@@ -0,0 +1,3 @@
+# This file ensures the docs/generated/ directory is tracked by git
+# Note: Generated documentation files are ignored by .gitignore
+# This directory is needed for Ralph loop execution

examples/.gitkeep

@@ -0,0 +1,2 @@
+# This file ensures the examples/ directory is tracked by git
+# Remove this file when you add actual example files

logs/.gitkeep

@@ -0,0 +1,3 @@
+# This file ensures the logs/ directory is tracked by git
+# Note: Actual log files are ignored by .gitignore
+# This directory is needed for Ralph loop execution

specs/stdlib/.gitkeep

@@ -0,0 +1,2 @@
+# This file ensures the specs/stdlib/ directory is tracked by git
+# Remove this file when you add actual specification files

src/.gitkeep

@@ -0,0 +1,2 @@
+# This file ensures the src/ directory is tracked by git
+# Remove this file when you add actual source files

templates/specs/.gitkeep

@@ -0,0 +1,2 @@
+# This file ensures the templates/specs/ directory is tracked by git
+# Remove this file when you add actual template specification files