Add spellchecking to this repository

.github/actions/spelling/README.md

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+# check-spelling/check-spelling configuration
+
+| File                                               | Purpose                                                         | Format                                                    | Info                                                                                                 |
+| -------------------------------------------------- | --------------------------------------------------------------- | --------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
+| [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-Examples%3A-reject)     |
+| [excludes.txt](excludes.txt)                       | Files to ignore entirely                                        | perl regular expression                                   | [excludes](https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples%3A-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-Examples%3A-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-Examples%3A-patterns) |
+| [line_forbidden.patterns](line_forbidden.patterns) | Patterns to flag in checked lines                               | perl regular expression (order matters, first match wins) | [patterns](https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples%3A-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.md](advice.md)                             | Supplement for GitHub comment when unrecognized words are found | GitHub Markdown                                           | [advice](https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples%3A-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.md

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+<!-- See https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples%3A-advice --> <!-- markdownlint-disable MD033 MD041 -->
+<details><summary>If the flagged items are false positives</summary>
+
+If items relate to a ...
+
+- binary file (or some other file you wouldn't want to check at all).
+
+  Please add a file path to the `excludes.txt` file matching the containing file.
+
+  File paths are Perl 5 Regular Expressions - you can [test](https://www.regexplanet.com/advanced/perl/) yours before committing to verify it will match your files.
+
+  `^` refers to the file's path from the root of the repository, so `^README\.md$` would exclude README.md (on whichever branch you're using).
+
+- well-formed pattern.
+
+  If you can write a [pattern](https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples:-patterns) that would match it,
+  try adding it to the `patterns.txt` file.
+
+  Patterns are Perl 5 Regular Expressions - you can [test](https://www.regexplanet.com/advanced/perl/) yours before committing to verify it will match your lines.
+
+  Note that patterns can't match multiline strings.
+
+</details>

.github/actions/spelling/excludes.txt

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+# See https://github.com/check-spelling/check-spelling/wiki/Configuration-Examples:-excludes
+(?:^|/)(?i)COPYRIGHT
+(?:^|/)(?i)LICEN[CS]E
+(?:^|/)go\.sum$
+(?:^|/)package(?:-lock|)\.json$
+(?:^|/)vendor/
+ignore$
+\.a$
+\.ai$
+\.avi$
+\.bmp$
+\.bz2$
+\.crt$
+\.dll$
+\.DS_Store$
+\.eot$
+\.exe$
+\.gif$
+\.gitattributes$
+\.graffle$
+\.gz$
+\.icns$
+\.ico$
+\.jar$
+\.jpe?g$
+\.key$
+\.lib$
+\.lock$
+\.map$
+\.min\..
+\.mod$
+\.mp[34]$
+\.o$
+\.ocf$
+\.otf$
+\.pdf$
+\.pem$
+\.png$
+\.psd$
+\.s$
+\.svg$
+\.tiff?$
+\.ttf$
+\.wav$
+\.webm$
+\.webp$
+\.woff2?$
+\.zip$
+^\.github/actions/spelling/
+^\Q.github/workflows/spelling.yml\E$

.github/actions/spelling/expect.txt

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+akic
+baf
+cgrp
+chronos
+Ckxomxaar
+cpe
+cqc
+dfdaf
+Dvf
+dvwa
+eecdfd
+FFn
+fjw
+fzvkw
+Gci
+hacklab
+hnlj
+hostpid
+hushlogin
+IBAA
+icanhazip
+Ikp
+JFUz
+Jhb
+kalilinux
+kbcxs
+kvct
+Kyybse
+lhost
+linux
+lport
+messagebus
+meterpreter
+MIIJKg
+msfconsole
+nch
+NCIs
+ndots
+nginx
+noproxy
+OPENSSH
+Perfetto
+pfuj
+pmuench
+procs
+randomart
+rdm
+rhel
+rkd
+secops
+Thu
+timesync
+umxf
+unminimize
+unnyfkbt
+upperdir
+vmss
+webserver
+xdsp
+XVCJ