Add the clang-tidy Configuration That Generated These Includes

Only misc-include-cleaner's missing-include check, with the headers it must never suggest: per-platform, internal and OS-specific ones that would break other platforms or are not meant to be included directly.

.clang-tidy

@@ -0,0 +1,18 @@
+# clang-tidy configuration. Only missing includes are reported for now: a file
+# should include the header for every symbol it uses, not rely on the
+# precompiled header or another header's includes. Run with --fix to add them.
+Checks: '-*,misc-include-cleaner'
+CheckOptions:
+  # Missing includes only. Builds without the precompiled header break on these.
+  misc-include-cleaner.UnusedIncludes: false
+  # Headers that declare a symbol but are not the one to include: per-platform
+  # implementations of wxWidgets and Boost.Thread (a Linux run would suggest the
+  # GTK or pthread one), library internals and forward declarations, CPython's
+  # headers behind Python.h, curl's behind curl.h, oneTBB's behind tbb/, and
+  # admesh's stl.h, which the include path also exposes without its directory.
+  # FFmpeg's C headers are left alone because they are only included inside
+  # extern "C", which an inserted include would miss. OS-specific headers (GLib,
+  # GTK, D-Bus, POSIX) are only used inside platform #if blocks, and an include
+  # added at the top of the file would break the other platforms' builds.
+  # A symbol these provide is not reported missing.
+  misc-include-cleaner.IgnoreHeaders: 'wx/(gtk|gtk1|msw|osx|unix|x11|motif|univ|qt|dfb|generic|private)/.*;.*/detail/.*;.*/impl/.*;.*_fwd\.hpp;python3\.[0-9]+/.*;bits/.*;imconfig\.h;expat_external\.h;admesh/stl\.h;boost/thread/(pthread|win32)/.*;boost/regex/v[0-9]+/.*;curl/(easy|multi|system|urlapi|header|options|websockets|mprintf)\.h;oneapi/tbb/.*;opencv2/core/hal/.*;openssl/ossl_typ\.h;libav[a-z]+/.*;libsw[a-z]+/.*;glib-2\.0/.*;gtk-3\.0/.*;dbus-1\.0/.*;sys/.*;unistd\.h;strings\.h;fcntl\.h;termios\.h'