fix(action): Fix Docker caching permission error

GitHub Actions doesn't grant us permission to cache the Docker root
directory even if Docker is running in rootless mode. Instead, on cache
miss, export the images to a TAR archive at a path we have permission to
cache and subsequently load from on cache hit. Composite actions don't
yet support post steps, so port to a TypeScript action since Docker
images can't be saved until after the calling workflow pulls or builds
them. Use Yarn Zero-Installs, because dependencies of GitHub Actions
must be version controlled, and Yarn Zero-Installs works by compressing
and tracking all Node.js dependencies. Check in the dist directory
output by TypeScript since GitHub Actions requires its presence in order
to run the action and cannot directly execute TypeScript. Add cache-hit
output so callers can branch if needed.

.gitattributes

@@ -5,3 +5,10 @@
 # Normalize line endings of all text files to LF when copying them from the
 # repository to the working directory, such as when checking them out.
 * text eol=lf
+
+# Yarn generates some minified JavaScript files that are technically text, but
+# that we don't want Git to check for whitespace errors.
+*.cjs binary
+
+# As of 2022-04-21, Git mistakenly categorizes Yarn cache files as textual.
+*.zip binary

.gitignore

@@ -3,3 +3,12 @@ report/
 
 # Poetry
 .venv
+
+# Yarn Zero-Installs
+.yarn/*
+!.yarn/cache
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/sdks
+!.yarn/versions

.jscpd.json

@@ -3,7 +3,7 @@
   "maxSize": 0,
   "threshold": 0,
   "reporters": ["consoleFull", "console"],
-  "ignore": [".git", ".venv"],
+  "ignore": [".git", ".venv", ".yarn"],
   "gitignore": true,
   "blame": true,
   "ignoreCase": true

.mega-linter.yaml

@@ -1,12 +1,15 @@
 APPLY_FIXES: all
+FILTER_REGEX_EXCLUDE: \.pnp\.(c|loader\.m)js|\.yarn/|dist
 DEFAULT_BRANCH: main
 FAIL_IF_MISSING_LINTER_IN_FLAVOR: true
 FORMATTERS_DISABLE_ERRORS: false
 PRINT_ALPACA: false
 SHOW_ELAPSED_TIME: true
 CREDENTIALS_SECRETLINT_ARGUMENTS: --secretlintignore .gitignore
+JAVASCRIPT_DEFAULT_STYLE: prettier
 JSON_PRETTIER_FILE_EXTENSIONS:
   - .json
   - .md
 MARKDOWN_MARKDOWNLINT_CONFIG_FILE: .markdownlint.yaml
 SPELL_CSPELL_CONFIG_FILE: LINTER_DEFAULT
+TYPESCRIPT_DEFAULT_STYLE: prettier