feat!: support multiple actions in a single readme

[deemp]

Change summary

• Update deps (closes update Chalk to 5.x #375)
• Support different actions in a readme (closes Support multiple actions in single README #205)
  • via <!-- action-docs-description="__tests__/fixtures/all_fields_action.yml" --> (see tests)
• Update table format
  • use HTML for descriptions (closes Escaping special characters in markdown #427)
• Handle missing fields in inputs (closes Getting error: Cannot read properties of undefined (reading 'using') #340)
• Provide the prepare script that allows to get the binary when installing from GitHub (addresses Latest version missing from npm #466 (comment))
  • npm i -g git+https://github.com/deemp/action-docs.git#0cb0ac2c40736aba24c4fd5097f1074b5a7c7a4b
  • Or, without a commit SHA: npm i -g git+https://github.com/deemp/action-docs.git

Migration notes

Comment tags should be updated from

<!-- action-docs-<section> -->

to

<!-- action-docs-<section> action="action.yml" -->

[deemp]

@npalm, please, review