Add philosophy section

Author: ufoym

.gitignore

@@ -30,3 +30,4 @@
 *.exe
 *.out
 *.app
+.DS_Store

Philosophy.pdf

@@ -1,2 +1,27 @@
 # cpp-core-guidelines-cheatsheet
  Cheatsheet for the C++ core guidelines, including a set of tried-and-true guidelines, rules, and best practices about coding in C++.
+
+
+- [x] P: Philosophy
+- [ ] I: Interfaces
+- [ ] F: Functions
+- [ ] C: Classes and class hierarchies
+- [ ] Enum: Enumerations
+- [ ] R: Resource management
+- [ ] ES: Expressions and statements
+- [ ] Per: Performance
+- [ ] CP: Concurrency and parallelism
+- [ ] E: Error handling
+- [ ] Con: Constants and immutability
+- [ ] T: Templates and generic programming
+- [ ] CPL: C-style programming
+- [ ] SF: Source files
+- [ ] SL: The Standard Library
+
+---
+
+### P: Philosophy 
+- [[Download PDF]](Philosophy.pdf) 
+- [[Download PNG Image]](Philosophy.png)
+
+![Philosophy](Philosophy.png)