feat: plugin code and updates

autoload/shellspec.vim

@@ -0,0 +1,56 @@
+" ShellSpec DSL formatter functions
+
+function! shellspec#format_buffer() abort
+  let l:pos = getpos('.')
+  let l:lines = getline(1, '$')
+  let l:formatted = shellspec#format_lines(l:lines)
+
+  silent! %delete _
+  call setline(1, l:formatted)
+  call setpos('.', l:pos)
+endfunction
+
+function! shellspec#format_lines(lines) abort
+  let l:result = []
+  let l:indent = 0
+
+  for l:line in a:lines
+    let l:trimmed = trim(l:line)
+
+    " Skip empty lines and comments
+    if l:trimmed == '' || l:trimmed =~ '^#'
+      call add(l:result, l:line)
+      continue
+    endif
+
+    " Decrease indent for End
+    if l:trimmed =~ '^End\s*$'
+      let l:indent = max([0, l:indent - 1])
+    endif
+
+    " Apply current indentation
+    let l:formatted = repeat('  ', l:indent) . l:trimmed
+    call add(l:result, l:formatted)
+
+    " Increase indent after block keywords
+    if l:trimmed =~ '^\(Describe\|Context\|ExampleGroup\|It\|Specify\|Example\)'
+      let l:indent += 1
+    elseif l:trimmed =~ '^\([xf]\)\(Describe\|Context\|ExampleGroup\|It\|Specify\|Example\)'
+      let l:indent += 1
+    elseif l:trimmed =~ '^\(Data\|Parameters\)\s*$'
+      let l:indent += 1
+    endif
+  endfor
+
+  return l:result
+endfunction
+
+function! shellspec#format_selection() abort
+  let l:start = line("'<")
+  let l:end = line("'>")
+  let l:lines = getline(l:start, l:end)
+  let l:formatted = shellspec#format_lines(l:lines)
+
+  call deletebufline('%', l:start, l:end)
+  call append(l:start - 1, l:formatted)
+endfunction