feat(dock): restore open panels on startup

[iamazy]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 85.94164% with 318 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.87%. Comparing base (cb36f7b) to head (dfba9e5).

Files with missing lines	Patch %	Lines
termua/src/window/main_window/state.rs	71.68%	79 Missing ⚠️
termua/src/panel/sftp_panel.rs	62.37%	73 Missing ⚠️
termua/src/window/main_window/actions/terminal.rs	57.48%	71 Missing ⚠️
termua/src/footbar/mod.rs	89.25%	33 Missing ⚠️
termua/src/window/main_window/actions/ssh.rs	83.58%	22 Missing ⚠️
crates/gpui_sftp/src/view/mod.rs	14.28%	18 Missing ⚠️
crates/gpui_dock/src/tab_panel.rs	89.04%	8 Missing ⚠️
crates/gpui_term/src/backends/wezterm/mod.rs	98.12%	4 Missing ⚠️
termua/src/ssh/mod.rs	0.00%	3 Missing ⚠️
termua/src/cast_player.rs	96.55%	2 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
+ Coverage   55.32%   57.87%   +2.55%     
==========================================
  Files         159      160       +1     
  Lines       54689    56846    +2157     
==========================================
+ Hits        30254    32897    +2643     
+ Misses      24435    23949     -486     

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