feat: basic QtShell and ShellComponent types

.clang-tidy

@@ -0,0 +1,54 @@
+WarningsAsErrors: '*'
+HeaderFilterRegex: '.*\.hpp'
+FormatStyle: file
+Checks: >
+  -*,
+  bugprone-*,
+  -bugprone-easily-swappable-parameters,
+  concurrency-*,
+  cppcoreguidelines-*,
+  -cppcoreguidelines-owning-memory,
+  -cppcoreguidelines-avoid-magic-numbers,
+  -cppcoreguidelines-pro-bounds-constant-array-index,
+  -cppcoreguidelines-avoid-const-or-ref-data-members,
+  google-build-using-namespace.
+  google-explicit-constructor,
+  google-global-names-in-headers,
+  google-readability-casting,
+  google-runtime-int,
+  google-runtime-operator,
+  misc-*,
+  -misc-no-recursion,
+  -misc-non-private-member-variables-in-classes,
+  modernize-*,
+  -modernize-return-braced-init-list,
+  -modernize-use-trailing-return-type,
+  performance-*,
+  portability-std-allocator-const,
+  readability-*,
+  -readability-function-cognitive-complexity,
+  -readability-function-size,
+  -readability-identifier-length,
+  -readability-magic-numbers,
+  -readability-uppercase-literal-suffix,
+  -readability-braces-around-statements,
+  -readability-redundant-access-specifiers,
+  tidyfox-*,
+CheckOptions:
+  performance-for-range-copy.WarnOnAllAutoCopies: true
+  performance-inefficient-string-concatenation.StrictMode: true
+  readability-braces-around-statements.ShortStatementLines: 1
+  readability-identifier-naming.ClassCase: CamelCase
+  readability-identifier-naming.ConstantCase: UPPER_CASE
+  readability-identifier-naming.EnumCase: CamelCase
+  readability-identifier-naming.FunctionCase: camelBack
+  readability-identifier-naming.MemberCase: camelBack
+  readability-identifier-naming.NamespaceCase: lower_case
+  readability-identifier-naming.LocalConstantCase: camelBack
+  readability-identifier-naming.MethodCase: camelBack
+  readability-identifier-naming.ParameterCase: camelBack
+  readability-identifier-naming.VariableCase: camelBack
+
+  # does not appear to work
+  readability-operators-representation.BinaryOperators: '&&;&=;&;|;~;!;!=;||;|=;^;^='
+  readability-operators-representation.OverloadedOperators: '&&;&=;&;|;~;!;!=;||;|=;^;^='