[DOCS] RELEASE-NOTES: 1.20.0

(cherry picked from commit 3fbcdd235b67c2292162949b1fd24e4fe1a55753)
(cherry picked from commit e7a621acae5ce34c91db41848a4a2bc3e1fae6f6)
(cherry picked from commit 70adac6d6659de22a87f2bdbee7297f677fc7b51)

[DOCS] RELEASE-NOTES: 1.20.0-0-rc0 (squash) rewording

(cherry picked from commit 1b79fab57d370f65b1a22fdec264889044d6ec17)

[DOCS] RELEASE-NOTES: 1.20.0-0-rc0 (squash) time

(cherry picked from commit cfd599a13224f3413abf7e75859224f4e48a3028)

[DOCS] RELEASE-NOTES: 1.20.0-0-rc0 (squash) wiki

(cherry picked from commit 6aa2ab41c60af2bb348971bd5e1110f7abf98727)

pick changes from go-gitea#829

(cherry picked from commit f5995981015fda2d012597aacfddb62d2b328230)

[DOCS] RELEASE-NOTES: 1.20.0-0-rc0 (squash) ui

(cherry picked from commit 5f0aa769b1691b0f12273d8e48ffda67fbe0ed02)

features

(cherry picked from commit d1e788ff4e3eeb9cb07cfc7ceb682b7d8414ab89)

typos

(cherry picked from commit 088d4b2d61b6c8210cde54a1e001860d2ec0cebc)

Mirror Settings

(cherry picked from commit 161412affd711b6a6ea4e3284d791137c69a6e6a)

features

(cherry picked from commit 10cb0379e2c557d43ce17ef3153e877684605a58)

fix typo

(cherry picked from commit aee096b04098b5a2ecaa75a40701ea7ddf4ad022)

TODO

(cherry picked from commit 0d4e0bb4a973f7bd2f6653ff18f2f0830d04da18)

typo

(cherry picked from commit b76a3c1a84333699c292f33027a80099587322ff)