Adopt towncrier for changelogs #23845

Job	Run time
🐧 all crates, 🦀 stable	9m 58s
🍏 all crates, 🦀 stable	15m 8s
Integration test (features: experimental-encrypted-state-events)	4m 30s
xtask / xtask-🐧	10s
Integration test (features: default)	5m 1s
xtask / xtask-🍏	1m 5s
🐧 all crates, 🦀 beta	8m 32s
Spell Check with Typos	7s
🐧 [m]-crypto	4m 52s
Lint	7m 7s
🐧 [m]-examples	1m 9s
🕸️ [m]-base	1m 26s
🕸️ [m]-ui	57s
🐧 [m], no-encryption	2m 13s
🐧 [m], markdown	3m 19s
🐧 [m], no-encryption-and-sqlite	1m 58s
🐧 [m], no-sqlite	3m 7s
🐧 [m], sqlite-cryptostore	3m 20s
🕸️ [m], no-default	2m 8s
🕸️ [m], indexeddb stores, no crypto	2m 8s
🕸️ [m]-common	1m 1s
🕸️ [m]-indexeddb	7m 12s
🕸️ [m], indexeddb stores	2m 31s
🐧 [m], socks	3m 20s
🐧 [m], sso-login	3m 19s
🐧 [m], search	2m 22s
🐧 [m], experimental-encrypted-state-events	3m 22s
🕸️ [m]-qrcode	31s
	1h 41m 53s

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