feat: store conversation to independent page (josStorer#120, josStore…

…r#138)

fix: model switch not work when autoRegenAfterSwitchModel is false

feat: customizable code block font size (josStorer#56)

feat: clear conversation (josStorer#51, josStorer#47)

chore: better i18n

chore: reduce package size

chore: improve popup compatibility for firefox

style: improve popup page adaptation in complex situations

style: reduce popup-tab font size

fix: styles are overwritten on some websites (josStorer#88)