docs(overhaul): provide a very detailed documentation for the options (…

…actions#456)

* docs: add doc for repo-token and fix a bunch of typo

* docs: add doc for days-before-stale

Closes actions#362

* docs: add doc for days-before-issue-stale

Closes actions#362

* docs: add doc for days-before-pr-stale

Closes actions#362

* docs: add doc for days-before-close options

Closes actions#362

* docs: add doc for stale-message options

Closes actions#362

* docs: add doc for close-message options

Closes actions#362

* docs: add doc for label options

Closes actions#362

* docs: add doc for exempt label options

Closes actions#362

* docs: add doc for only labels options

Closes actions#362

* docs: add doc for any of labels options

Closes actions#362

* docs: add doc for enable-statistics option

Closes actions#362

* docs: add doc for exempt milestones options

Closes actions#362

* docs: add doc for exempt all milestones options

Closes actions#362

* docs: add doc for assignees options

Closes actions#362

* docs: add doc for remove-stale-when-updated options

Closes actions#362

* docs: add doc for debug-only option

Closes actions#362

* docs: add doc for ascending option

Closes actions#362

* docs: add doc for skip-stale-message options

Closes actions#362

* docs: add doc for start-date option

Closes actions#362

* docs: add doc for delete-branch option

Closes actions#362

* docs: remove duplicated row

* docs: shorten the description in the array

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* chore(readme): enhance typo

* chore(readme): enhance typo

* chore(readme): enhance typo

* docs(readme): apply suggestion

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>

* chore(readme): enhance typo

* chore(readme): enhance typo

* chore(readme): enhance typo

* chore(readme): enhance typo

* docs(readme): add more information for days-before-stale option

* docs(readme): apply suggestion

* docs(readme): remove duplicated entry

nice catch @luketomlinson

Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>