Init: setup unity and code confg file for builtin library

- add unity setup in CAN lib, include makefiles take unity from local install path
- code check files such like cpp checheck, clang-tidy and so on
- format CAN lib with clang-format

.gitignore

@@ -2,5 +2,4 @@
 .vscode
 pkg_build
 build
-.clang-format
 **/__pycache__/

config/arduinoLibraryTemplate/library.properties

@@ -0,0 +1,10 @@
+name=CAN
+version=1.0.0
+author=Infineon Technologies <www.infineon.com>
+maintainer=Infineon Technologies <www.infineon.com>
+sentence=C++ CAN library
+paragraph=C++ CAN library
+category=Library
+url=https://github.com/Infineon/<fill in url>
+architectures=*
+includes=CAN.hpp

config/clang-format/.clang-format

@@ -0,0 +1,26 @@
+---
+# We'll use defaults from the LLVM style, but with 4 columns indentation.
+#BasedOnStyle: GNU
+BasedOnStyle: LLVM
+#BasedOnStyle: Google
+#BasedOnStyle: Mozilla
+#BasedOnStyle: Chromium
+IndentWidth: 4
+---
+Language: Cpp
+# BasedOnStyle: Google
+AccessModifierOffset: -4
+Standard: c++17
+TabWidth: 2
+UseTab: Never
+ColumnLimit: 100
+AlignAfterOpenBracket: Align
+BinPackParameters: false
+AlignEscapedNewlines: Left
+AlwaysBreakTemplateDeclarations: Yes
+PackConstructorInitializers: Never
+BreakConstructorInitializersBeforeComma: false
+IndentPPDirectives: BeforeHash
+SortIncludes: Never
+SeparateDefinitionBlocks: Always
+...

config/clang-tidy/.clang-tidy

@@ -0,0 +1,54 @@
+Checks: 'cppcoreguidelines-*,
+performance-*,
+modernize-*,
+google-*,
+misc-*
+cert-*,
+readability-*,
+clang-analyzer-*,
+-performance-unnecessary-value-param,
+-modernize-use-trailing-return-type,
+-google-runtime-references,
+-misc-non-private-member-variables-in-classes,
+-readability-braces-around-statements,
+-google-readability-braces-around-statements,
+-cppcoreguidelines-avoid-magic-numbers,
+-readability-magic-numbers,
+-readability-magic-numbers,
+-cppcoreguidelines-pro-type-vararg,
+-cppcoreguidelines-pro-bounds-pointer-arithmetic,
+-cppcoreguidelines-avoid-c-arrays,
+-modernize-avoid-c-arrays,
+-cppcoreguidelines-pro-bounds-array-to-pointer-decay,
+-readability-named-parameter,
+-cert-env33-c
+'
+
+
+WarningsAsErrors: ''
+HeaderFilterRegex: '.*'
+#HeaderFilterRegex: '*spdlog/[^f].*'
+AnalyzeTemporaryDtors: false
+FormatStyle: none
+
+CheckOptions: 
+ - key: google-readability-braces-around-statements.ShortStatementLines
+ value: '1'
+ - key: google-readability-function-size.StatementThreshold
+ value: '800'
+ - key: google-readability-namespace-comments.ShortNamespaceLines
+ value: '10'
+ - key: google-readability-namespace-comments.SpacesBeforeComments
+ value: '2'
+ - key: modernize-loop-convert.MaxCopySize
+ value: '16'
+ - key: modernize-loop-convert.MinConfidence
+ value: reasonable
+ - key: modernize-loop-convert.NamingStyle
+ value: CamelCase
+ - key: modernize-pass-by-value.IncludeStyle
+ value: llvm
+ - key: modernize-replace-auto-ptr.IncludeStyle
+ value: llvm
+ - key: modernize-use-nullptr.NullMacros
+ value: 'NULL'