feat: support to select shell type

[iamazy]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 89.08418% with 118 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.63%. Comparing base (273a407) to head (c348403).

Files with missing lines	Patch %	Lines
crates/gpui_term/src/element.rs	67.54%	37 Missing ⚠️
termua/src/window/new_session/mod.rs	86.15%	18 Missing ⚠️
crates/gpui_term/src/view/scrolling.rs	92.26%	15 Missing ⚠️
crates/gpui_term/src/view/scrollbar.rs	0.00%	11 Missing ⚠️
termua/src/window/new_session/state.rs	87.14%	9 Missing ⚠️
crates/gpui_term/src/view/search.rs	0.00%	7 Missing ⚠️
crates/gpui_dock/src/tab_panel.rs	93.75%	6 Missing ⚠️
termua/src/window/main_window/actions/terminal.rs	93.84%	4 Missing ⚠️
termua/src/window/new_session/actions.rs	88.57%	4 Missing ⚠️
crates/gpui_term/src/shell.rs	97.91%	3 Missing ⚠️
... and 3 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
+ Coverage   58.06%   58.63%   +0.57%     
==========================================
  Files         160      160              
  Lines       56980    57762     +782     
==========================================
+ Hits        33083    33868     +785     
+ Misses      23897    23894       -3     

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