Issue #3164676 by longwave, jungle, kishor_kolekar, ankithashetty: Ignore 20 misspelled words used only in test fixtures

Issue #3111409 by mherchel, proeung, larowlan, alexpott, lauriii, Gábor Hojtsy, andrewmacpherson, catch, xjm, andypost, rahulrasgon, rabbitlair, mrconnerton, poojakural, boulaffasae, jerseycheese, shimpy, Indrajith KB, DuneBL, kiran.kadam911, komalkolekar, keboca, hawkeye.twolf, andrewozone, Maithri Shetty, alexdmccabe, sd9121, Sreenivas Bttv, katannshaw, mgifford, nod_, webchick, mtift, rainbreaw, Berdir, brianperry, thejimbirch, Dom., q0rban, nitesh624, hansa11, himanshu_sindhwani, kostyashupenko, shaktik, bnjmnm, sharma.amitt16, sonam.chaturvedi, steinmb, shaal, ressa, Ramya Balasubramanian, Sebacic, pradeepjha, tanmaykadam, thedrupalkid, vinitk, volkswagenchick, viappidu, vebrovski, Ujval Shah, Webbeh, Yuri, trebormc, msuthars, mrinalini9, bash247, chetanbharambe, ellenoise, anevins, andriyun, CocoM, JayKandari, ambuj_gupta, hussainweb, jhodgdon, Pooja Ganjage, ju.vanderw, jwitkowski79, MaxPah, Lokender Singh2, jponch, KarenS, KarinG, Lal_: Add new Olivero frontend theme to Drupal 9.1 core as beta; later make it stable and the default

Issue #3138766 by mohrerao, longwave, sja112, jameszhang023, Lal_, ravi.shankar, jungle, xjm: Fix "Don't" relevant typos in core

Issue #3154594 by jungle, alexpott: CSpell is not skipping composer.json and composer.lock, which will prevent committing dependency updates or tagging releases unless --no-verify is used

Issue #2972224 by alexpott, longwave, jungle, sja112, xjm, dww, daffie, kiamlaluno, dawehner, quietone, Lendude: Add .cspell.json to automate spellchecking in Drupal core