* chore: add en-GB language

* chore: remove en-GB contents

* chore: prevent visitors from breaking demo
- prevent disabling password login
- prevent updating `memos-demo` user
- prevent setting additional style
- prevent setting additional script
- add some error feedback to system settings UI

* Revert "chore: add en-GB language"

This reverts commit 2716377b04ca684abd03f76c1661000fd6994be8.

* chore: speed-up migrator and lower memory usage
- remove all Store indirections
- query database directly with prepared statements

* chore: fix golangci-lint warnings

* chore: add en-GB language

* chore: remove en-GB contents

* chore: prevent visitors from breaking demo
- prevent disabling password login
- prevent updating `memos-demo` user
- prevent setting additional style
- prevent setting additional script
- add some error feedback to system settings UI

* Revert "chore: add en-GB language"

This reverts commit 2716377b04ca684abd03f76c1661000fd6994be8.

* chore: add en-GB language

* chore: remove en-GB contents

* fix: error check for the same oss-storage

* fix: conflict error2 variable in code refactor in s3.go

* chore: rename endpointUrl to endpointURL

Co-authored-by: boojack <stevenlgtm@gmail.com>

* Add gRPC Memos Export

* Update code style

* Add URL.revokeObjectURL

* Rename protobuf and ESLint fix

* Change MemosExport to ExportMemos

Adds automatically background refresh of all external links if they are belongs to the current blob (S3) storage. The feature is disabled by default in order to keep backward compatibility.

The background go-routine spawns once during startup and periodically signs and updates external links if that links belongs to current S3 storage.

The original idea was to sign external links on-demand, however, with current architecture it will require duplicated code in plenty of places. If do it, the changes will be quite invasive and in the end pointless: I believe, the architecture will be eventually updated to give more scalable way for pluggable storage. For example - Upload/Download interface without hard dependency on external link. There are stubs already, but I don't feel confident enough to change significant part of the application architecture.