HWID Support & Visual Core Editor

v4.0.0-rc.1...v4.0.0

latency: Add outbound latency tracking and API endpoint (37462a07)
core-editor: Add WireGuard outbound protocol support (ed8e30cd)
core-editor: Add outbound latency testing dialog (089f85dd)
core-editor: Add tabbed filtering for xray advanced config editor (99b95852)

Return real count in get_users_count_metric (c09d9241)
Russian typo (0b420860)
subscription: Adjust HWID registration logic for subscription page requests (845a01d2)
Validation and remove XTLSFlow usage (08e2222b)
code-editor: Update dialog close button selector for fullscreen mode (48396765)
string-array-popover: Update add button alignment and responsive classes (89cc0d2c)
subscription-rules: Update overflow and spacing for drag-and-drop layout (f2a00120)
dependencies: Update pasarguard-node-bridge to version 0.8.1 (cdbd2466)
core-editor-data-table: Adjust index column width and padding (1998955f)
api: Make count_during_period optional in UserCountMetricStatsList (60539eab)
user: Remove int type constraint from user_id path parameter (c4bb0385)
code-editor-panel: Update header layout alignment (87761a45)
core-editor: Improve xray advanced tabs layout and scrolling (e7fe6244)
core-editor: Adjust sticky save bar bottom margin spacing (e3ee3a16)

localizations: Update master node label terminology across locales (e9f90470)