Add Symfony Deprecation Contracts package

- Created CHANGELOG.md to maintain version history.
- Added README.md with usage instructions for the trigger_deprecation() function.
- Initialized composer.json for the Symfony Deprecation Contracts library, specifying dependencies and autoloading.

modules/pshowsso/deps/patrickbussmann/oauth2-apple/.editorconfig

@@ -0,0 +1,34 @@
+# https://github.com/php/php-src/blob/master/.editorconfig
+
+root = true
+
+[*]
+trim_trailing_whitespace = true
+insert_final_newline     = true
+end_of_line              = lf
+charset                  = utf-8
+tab_width                = 4
+
+[{*.{awk,bat,c,cpp,d,h,l,re,skl,w32,y},Makefile*}]
+indent_size              = 4
+indent_style             = tab
+
+[*.{dtd,html,inc,php,phpt,rng,wsdl,xml,xsd,xsl}]
+indent_size              = 4
+indent_style             = space
+
+[*.{ac,m4,sh,yml}]
+indent_size              = 2
+indent_style             = space
+
+[*.md]
+indent_style             = space
+max_line_length          = 80
+
+[COMMIT_EDITMSG]
+indent_size              = 4
+indent_style             = space
+max_line_length          = 80
+
+[*.patch]
+trim_trailing_whitespace = false