enhance: Proxy custom emojis to reduce image size and accelerate the frontend (#9431)

* fix(server): /emoji to accept `@.` host expression

* fix(client): use MkEmoji for custom emoji in MkEmojiPicker

* change convertToWebp

* nanka iroiro

* remove

* fix

* nearLosslessは労多くして益少なしなのでやめる

* do not cleanup tmp for development

* update sharp.js to 0.31.3

* mixed: true

* fix MkAutocomplete of 912791b3ab

* clean up

* https://github.com/misskey-dev/misskey/pull/9431#discussion_r1059215943

packages/backend/src/core/DownloadService.ts

@@ -33,7 +33,7 @@ export class DownloadService {
 
 	@bindThis
 	public async downloadUrl(url: string, path: string): Promise<void> {
-		this.logger.info(`Downloading ${chalk.cyan(url)} ...`);
+		this.logger.info(`Downloading ${chalk.cyan(url)} to ${chalk.cyanBright(path)} ...`);
 	
 		const timeout = 30 * 1000;
 		const operationTimeout = 60 * 1000;