chore: add ninja format command

meson.build

@@ -40,7 +40,6 @@ tgbot_dep = declare_dependency(
 )
 
 cppcheck = find_program('cppcheck', required: false)
-
 if cppcheck.found()
     run_target(
         'cppcheck',
@@ -57,6 +56,11 @@ if cppcheck.found()
     )
 endif
 
+clangformat = find_program('clang-format', required: false)
+if clangformat.found()
+    run_target('format', command: [clangformat, '-i', sources])
+endif
+
 # Example
 executable(
     'example',