Add check-spelling/check-spelling

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

Author: jsoref

.github/actions/spelling/README.md

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+# check-spelling/check-spelling configuration
+
+File | Purpose | Format | Info
+-|-|-|-
+[dictionary.txt](dictionary.txt) | Replacement dictionary (creating this file will override the default dictionary) | one word per line | [dictionary](https://github.com/check-spelling/check-spelling/wiki/Configuration#dictionary)
+[allow.txt](allow.txt) | Add words to the dictionary | one word per line (only letters and `'`s allowed) | [allow](https://github.com/check-spelling/check-spelling/wiki/Configuration#allow)
+[reject.txt](reject.txt) | Remove words from the dictionary (after allow) | grep pattern matching whole dictionary words | [reject](https://github.com/check-spelling/check-spelling/wiki/Configuration#reject)
+[excludes.txt](excludes.txt) | Files to ignore entirely | perl regular expression | [excludes](https://github.com/check-spelling/check-spelling/wiki/Configuration#excludes)
+[only.txt](only.txt) | Only check matching files (applied after excludes) | perl regular expression | [only](https://github.com/check-spelling/check-spelling/wiki/Configuration#only)
+[patterns.txt](patterns.txt) | Patterns to ignore from checked lines | perl regular expression (order matters, first match wins) | [patterns](https://github.com/check-spelling/check-spelling/wiki/Configuration#patterns)
+[expect.txt](expect.txt) | Expected words that aren't in the dictionary | one word per line (sorted, alphabetically) | [expect](https://github.com/check-spelling/check-spelling/wiki/Configuration#expect)
+[advice.txt](advice.txt) | Supplement for GitHub comment when unrecognized words are found | GitHub Markdown | [advice](https://github.com/check-spelling/check-spelling/wiki/Configuration#advice)
+
+Note: you can replace any of these files with a directory by the same name (minus the suffix)
+and then include multiple files inside that directory (with that suffix) to merge multiple files together.

.github/actions/spelling/advice.txt

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+<!-- See https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples%3A-advice -->

.github/actions/spelling/allow.txt

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+# See https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples:-excludes
+(?:^|/)(?i)COPYRIGHT
+(?:^|/)(?i)LICEN[CS]E
+(?:^|/)package(?:-lock)\.json$
+(?:^|/)vendor/
+/CREDITS$
+/tests/
+build/
+ignore$
+\.BINS$
+\.bmp$
+\.bz2$
+\.cdb$
+\.cfg$
+\.crt$
+\.csr$
+\.data$
+\.dict$
+\.dll$
+\.editorconfig$
+\.eml$
+\.exe$
+\.gcov$
+\.gd$
+\.gd2$
+\.gdbinit$
+\.gif$
+\.gitattributes$
+\.gitignore$
+\.global$
+\.gz$
+\.ico$
+\.iff$
+\.INTERNALS$
+\.jp2$
+\.jpc$
+\.jpeg$
+\.JPG$
+\.jpg$
+\.key$
+\.lock$
+\.magic$
+\.min\.
+\.mo$
+\.mod$
+\.mov$
+\.mp3$
+\.odt$
+\.otf$
+\.p12$
+\.p7b$
+\.p7s$
+\.patch$
+\.pdf$
+\.pem$
+\.pfx$
+\.phar$
+\.pharignore$
+\.png$
+\.po$
+\.ppt$
+\.psd$
+\.pubkey$
+\.pwl$
+\.res$
+\.rng$
+\.swf$
+\.sym$
+\.tar$
+\.tcfg$
+\.tga$
+\.tgz$
+\.tiff$
+\.ttf$
+\.w32$
+\.wbmp$
+\.webm$
+\.webp$
+\.xbm$
+\.xls$
+\.xml$
+\.xpm$
+\.zip$
+^azure/apt\.yml$
+^azure/configure\.yml$
+^azure/i386/apt\.yml$
+^azure/macos/brew\.yml$
+^ext/
+^sapi/cli/mime_type_map\.h$
+^sapi/fuzzer/corpus/json/14\.json$
+^sapi/fuzzer/corpus/json/2\.json$
+^sapi/fuzzer/corpus/json/4\.json$
+^sapi/fuzzer/Makefile\.frag$
+^tests/strings/001\.phpt$
+^travis/compile\.sh$
+^win32/build/libs_version\.txt$
+^win32/cp_enc_map
+^win32/unistd\.h$
+^\.github/