feat(git): support pushing a single tag by name

- add tag_name parameter to push command in documentation and schema
- update GitTool.push to handle tag_name argument
- modify git_edit to pass tag_name to GitTool.push

Author: jinzhongjia

README.md

@@ -156,7 +156,7 @@ In any CodeCompanion chat buffer, use `@git_read` or `@git_edit` to perform Git
 - `@git_edit gitignore_add --gitignore_rule "RULE"` - Add rule to .gitignore
 - `@git_edit gitignore_add --gitignore_rules ["rule1", "rule2"]` - Add multiple rules
 • `@git_edit gitignore_remove --gitignore_rule "RULE"` - Remove rule from .gitignore
-• `@git_edit push [--remote REMOTE] [--branch BRANCH] [--force BOOL] [--tags BOOL]` - Push changes to a remote repository.
+• `@git_edit push [--remote REMOTE] [--branch BRANCH] [--force BOOL] [--tags BOOL] [--tag_name NAME]` - Push changes to a remote repository.
   WARNING: `force` push is dangerous and can overwrite remote history. Use with extreme caution.
 • `@git_edit rebase [--onto ONTO] [--base BASE] [--interactive BOOL]` - Rebase current branch onto another.
   WARNING: `interactive` rebase opens an editor and is not suitable for automated environments. It can also rewrite history.

doc/codecompanion-gitcommit.txt

@@ -425,7 +425,7 @@ GitIgnore Management~
 • `@git_edit rebase: Rebase current branch (WARNING: interactive rebase is dangerous)
 • `@git_edit cherry_pick: Apply changes from existing commits
 • `@git_edit revert: Revert a commit
-• `@git_edit push [--remote REMOTE] [--branch BRANCH] [--force BOOL] [--tags BOOL]` - Push changes to a remote repository.
+• `@git_edit push [--remote REMOTE] [--branch BRANCH] [--force BOOL] [--tags BOOL] [--tag_name NAME]` - Push changes to a remote repository.
   WARNING: `force` push is dangerous and can overwrite remote history. Use with extreme caution.
 
 7.4 Safety Features				*codecompanion-gitcommit-safety*

lua/codecompanion/_extensions/gitcommit/tools/git.lua

@@ -394,8 +394,9 @@ end
 ---@param branch? string The name of the branch to push (defaults to current branch)
 ---@param force? boolean Force push (DANGEROUS: overwrites remote history)
 ---@param tags? boolean Push all tags
+---@param tag_name? string The name of a single tag to push
 ---@return boolean success, string output
-function GitTool.push(remote, branch, force, tags)
+function GitTool.push(remote, branch, force, tags, tag_name)
   local cmd = "git push"
   if force then
     cmd = cmd .. " --force"
@@ -409,6 +410,9 @@ function GitTool.push(remote, branch, force, tags)
   if tags then
     cmd = cmd .. " --tags"
   end
+  if tag_name then
+    cmd = cmd .. " " .. vim.fn.shellescape(tag_name)
+  end
   return execute_git_command(cmd)
 end
 

lua/codecompanion/_extensions/gitcommit/tools/git_edit.lua

@@ -102,6 +102,10 @@ GitEdit.schema = {
               type = "boolean",
               description = "Push all tags",
             },
+            tag_name = {
+              type = "string",
+              description = "The name of a single tag to push",
+            },
             onto = {
               type = "string",
               description = "The branch to rebase onto",
@@ -241,7 +245,7 @@ Available write-access Git operations:
       end
       success, output = GitTool.remove_gitignore_rule(rules)
     elseif operation == "push" then
-      success, output = GitTool.push(op_args.remote, op_args.branch, op_args.force, op_args.tags)
+      success, output = GitTool.push(op_args.remote, op_args.branch, op_args.force, op_args.tags, op_args.tag_name)
     elseif operation == "rebase" then
       success, output = GitTool.rebase(op_args.onto, op_args.base, op_args.interactive)
     elseif operation == "cherry_pick" then