Rewrite on simdjson with a flat src and smack-style build

.clang-format

@@ -1,11 +1,32 @@
+BasedOnStyle: LLVM
+IndentWidth: 4
 ColumnLimit: 120
-PointerAlignment: Left
-ReferenceAlignment: Left
-AllowShortFunctionsOnASingleLine: All
-AllowShortIfStatementsOnASingleLine: true
-CommentPragmas: '^'
-BreakBeforeBraces: Allman
-NamespaceIndentation: All
-FixNamespaceComments: false
+BreakBeforeBraces: Custom
+BraceWrapping:
+  AfterCaseLabel: true
+  AfterClass: true
+  AfterControlStatement: Always
+  AfterEnum: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterStruct: true
+  AfterUnion: true
+  AfterExternBlock: true
+  BeforeCatch: true
+  BeforeElse: true
+  BeforeLambdaBody: false
+  BeforeWhile: true
+  SplitEmptyFunction: false
+  SplitEmptyRecord: false
+RemoveBracesLLVM: true
+InsertBraces: false
+SortIncludes: Never
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: Never
+AllowShortLoopsOnASingleLine: false
+AllowShortBlocksOnASingleLine: Never
+AllowShortLambdasOnASingleLine: Inline
+AccessModifierOffset: -4
 IndentCaseLabels: true
-IndentPPDirectives: BeforeHash
+NamespaceIndentation: None
+PointerAlignment: Left