refactor: update prettier and doctoc (#5605)

* docs: add toc to CODE OF CONDUCT

* chore: add prettier ignore blocks to docs

* chore: update styles for Dockerfile

* refactor: separate prettier, doctoc

This does a couple things:
- update `.prettierignore`
- split `prettier` and `doctoc` commands. you can still run with `yarn
  fmt`
- delete `fmt.sh` and add `doctoc.sh`

By doing so, we can run tasks in parallel in CI and we should also have
less false positives than before with `yarn fmt` locally.

* refactor: update prettier job, add doctoc

This modifies the prettier job to use actionsx/prettier. It also adds a
job for `doctoc`.

* chore: upgrade to prettier 2.7.1

* chore: pin doctoc to 2.0.0

* fixup!: add .pc to prettierignore

* feat: add --cache to prettier cmd

yarn.lock

@@ -952,16 +952,16 @@ dir-glob@^3.0.1:
   dependencies:
     path-type "^4.0.0"
 
-doctoc@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/doctoc/-/doctoc-2.0.1.tgz#d5aee2bce65a438ff8717d9e51df3d540caa3b78"
-  integrity sha512-JsxnSVZtLCThKehjFPBDhP1+ZLmdfXQynZH/0ABAwrnd1Zf3AV6LigC9oWJyaZ+c6RXCDnlGUNJ7I+1v8VaaRg==
+doctoc@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/doctoc/-/doctoc-2.0.0.tgz#3c5c51ba89acb9b8e1924cc429500d6de2dfb90e"
+  integrity sha512-thvCndtwVPe3GCDUG09NYPu9D72Ons3MFh/Fe5A3bePMHGa1XSMgJWyL04bkxa0DyyaylEB2UrqigbQM0fcj7w==
   dependencies:
     "@textlint/markdown-to-ast" "~6.1.7"
     anchor-markdown-header "~0.5.7"
     htmlparser2 "~4.1.0"
     minimist "~1.2.5"
-    underscore "~1.12.1"
+    underscore "~1.10.2"
     update-section "~0.3.3"
 
 doctrine@^2.1.0:
@@ -2583,10 +2583,10 @@ prettier-plugin-sh@^0.12.0:
   dependencies:
     mvdan-sh "^0.10.1"
 
-prettier@^2.2.1:
-  version "2.3.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.3.2.tgz#ef280a05ec253712e486233db5c6f23441e7342d"
-  integrity sha512-lnJzDfJ66zkMy58OL5/NY5zp70S7Nz6KqcKkXYzn2tMVrNxvbqaBpg7H3qHaLxCJ5lNMsGuM8+ohS7cZrthdLQ==
+prettier@2.7.1:
+  version "2.7.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.7.1.tgz#e235806850d057f97bb08368a4f7d899f7760c64"
+  integrity sha512-ujppO+MkdPqoVINuDFDRLClm7D78qbDt0/NR+wp5FqEZOoTNAjPHWj17QRhu7geIHJfcNhRk1XVQmF8Bp3ye+g==
 
 progress@^2.0.0:
   version "2.0.3"
@@ -3288,7 +3288,7 @@ unbox-primitive@^1.0.0:
     has-symbols "^1.0.2"
     which-boxed-primitive "^1.0.2"
 
-underscore@^1.13.1, underscore@~1.12.1:
+underscore@^1.13.1, underscore@~1.10.2:
   version "1.13.1"
   resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.13.1.tgz#0c1c6bd2df54b6b69f2314066d65b6cde6fcf9d1"
   integrity sha512-hzSoAVtJF+3ZtiFX0VgfFPHEDRm7Y/QPjGyNo4TVdnDTdft3tr8hEkD25a1jC+TjTuE7tkHGKkhwCgs9dgBB2g==