patch 9.1.1756: termdebug: Need a few more user commands

Problem:  termdebug: Need a few more user commands
Solution: Add the :RunOrContinue and the :ToggleBreak user commands
          (bennyyip)

closes: #18283

Signed-off-by: bennyyip <yebenmy@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

runtime/doc/tags

@@ -2212,6 +2212,7 @@ $quote	eval.txt	/*$quote*
 :Rexplore	pi_netrw.txt	/*:Rexplore*
 :RmVimball	pi_vimball.txt	/*:RmVimball*
 :Run	terminal.txt	/*:Run*
+:RunOrContinue	terminal.txt	/*:RunOrContinue*
 :RustEmitAsm	ft_rust.txt	/*:RustEmitAsm*
 :RustEmitIr	ft_rust.txt	/*:RustEmitIr*
 :RustExpand	ft_rust.txt	/*:RustExpand*
@@ -2233,6 +2234,7 @@ $quote	eval.txt	/*$quote*
 :Termdebug	terminal.txt	/*:Termdebug*
 :TermdebugCommand	terminal.txt	/*:TermdebugCommand*
 :Texplore	pi_netrw.txt	/*:Texplore*
+:ToggleBreak	terminal.txt	/*:ToggleBreak*
 :Tutor	pi_tutor.txt	/*:Tutor*
 :URLOpen	eval.txt	/*:URLOpen*
 :Until	terminal.txt	/*:Until*

runtime/doc/terminal.txt

@@ -1,4 +1,4 @@
-*terminal.txt*	For Vim version 9.1.  Last change: 2025 Sep 02
+*terminal.txt*	For Vim version 9.1.  Last change: 2025 Sep 14
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1427,12 +1427,16 @@ gdb:
  :Tbreak {position}
 		set a temporary breakpoint at the specified position
  *:Clear*	delete the breakpoint at the cursor position
+ *:ToggleBreak*	set a breakpoint at the cursor position or delete all
+		breakpoints at the cursor positoin
 
  *:Step*	execute the gdb "step" command
  *:Over*	execute the gdb "next" command (`:Next` is a Vim command)
  *:Until*	execute the gdb "until" command
  *:Finish*	execute the gdb "finish" command
  *:Continue*	execute the gdb "continue" command
+ *:RunOrContinue* execute the gdb "continue" command if program is running,
+		otherwise run the program
  *:Stop*	interrupt the program
 
 If 'mouse' is set the plugin adds a window toolbar with these entries:

runtime/pack/dist/opt/termdebug/plugin/termdebug.vim

@@ -4,7 +4,7 @@ vim9script
 
 # Author: Bram Moolenaar
 # Copyright: Vim license applies, see ":help license"
-# Last Change: 2025 Sep 02
+# Last Change: 2025 Sep 14
 # Converted to Vim9: Ubaldo Tiberi <ubaldo.tiberi@gmail.com>
 
 # WORK IN PROGRESS - The basics works stable, more to come
@@ -1173,6 +1173,7 @@ def InstallCommands()
 
   command -nargs=? Break  SetBreakpoint(<q-args>)
   command -nargs=? Tbreak  SetBreakpoint(<q-args>, true)
+  command ToggleBreak ToggleBreak()
   command Clear  ClearBreakpoint()
   command Step  SendResumingCommand('-exec-step')
   command Over  SendResumingCommand('-exec-next')
@@ -1182,6 +1183,7 @@ def InstallCommands()
   command -nargs=* Arguments  SendResumingCommand('-exec-arguments ' .. <q-args>)
   command Stop StopCommand()
   command Continue ContinueCommand()
+  command RunOrContinue RunOrContinue()
 
   command -nargs=* Frame  Frame(<q-args>)
   command -count=1 Up  Up(<count>)
@@ -1296,6 +1298,8 @@ def DeleteCommands()
   delcommand Asm
   delcommand Var
   delcommand Winbar
+  delcommand RunOrContinue
+  delcommand ToggleBreak
 
 
   if !empty(saved_K_map) && !saved_K_map.buffer
@@ -1439,6 +1443,19 @@ def ClearBreakpoint()
   endif
 enddef
 
+def ToggleBreak()
+  var fname = fnameescape(expand('%:p'))
+  var lnum = line('.')
+  var bploc = printf('%s:%d', fname, lnum)
+  if has_key(breakpoint_locations, bploc)
+    while has_key(breakpoint_locations, bploc)
+        ClearBreakpoint()
+    endwhile
+  else
+    SetBreakpoint("")
+  endif
+enddef
+
 def Run(args: string)
   if args != ''
     SendResumingCommand($'-exec-arguments {args}')
@@ -1446,6 +1463,14 @@ def Run(args: string)
   SendResumingCommand('-exec-run')
 enddef
 
+def RunOrContinue()
+    if running
+      ContinueCommand()
+    else
+      Run('')
+    endif
+enddef
+
 # :Frame - go to a specific frame in the stack
 def Frame(arg: string)
   # Note: we explicit do not use mi's command
@@ -2004,7 +2029,10 @@ def HandleNewBreakpoint(msg: string, modifiedFlag: bool)
     if !has_key(breakpoint_locations, bploc)
       breakpoint_locations[bploc] = []
     endif
-    breakpoint_locations[bploc] += [id]
+    if breakpoint_locations[bploc]->index(id) == -1
+      # Make sure all ids are unique
+      breakpoint_locations[bploc] += [id]
+    endif
 
     var posMsg = ''
     if bufloaded(fname)