chore: set up commitlint, husky, and prettier (#1451)

* chore: add prettier configuration

Signed-off-by: Xe Iaso <me@xeiaso.net>

* format: run prettier tree-wide

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(prettier): ignore intentionally ungrammatical files

Signed-off-by: Xe Iaso <me@xeiaso.net>

* ci: add PR title lint rule

Signed-off-by: Xe Iaso <me@xeiaso.net>

* ci: add DCO check

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: add commitlint and husky

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: add CONTRIBUTING guidelines

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: set SKIP_INTEGRATION in precommit tests

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: update spelling

Signed-off-by: Xe Iaso <me@xeiaso.net>

* ci(dco): remove reopened trigger

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore: remove dead file

Signed-off-by: Xe Iaso <me@xeiaso.net>

* chore(prettier): don't format nginx includes

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>

lib/localization/locales/et.json

@@ -63,4 +63,4 @@
   "js_calculation_error_msg": "Ei suutnud kontrolli arvutada:",
   "missing_required_forwarded_headers": "Puuduvad nõutud X-Forwarded-* päised",
   "simplified_explanation": "See on meede robotite ja pahatahtlike päringute vastu, mis sarnaneb CAPTCHA-le. Kuid selle asemel, et peaksite ise tööd tegema, antakse teie brauserile arvutusülesanne, mille see peab lahendama, et tagada selle kehtivus kliendina. Seda kontseptsiooni nimetatakse <a href=\"https://en.wikipedia.org/wiki/Proof_of_work\">Töötõendiks</a>. Ülesanne arvutatakse mõne sekundiga ja teile antakse juurdepääs veebisaidile. Täname teid mõistva suhtumise ja kannatlikkuse eest."
-}
+}