vim-patch:9.0.{1419,1421,1422,1423}: some files are not recognized (#22749)

vim-patch:9.0.1419: Lean files are not recognized

Problem:    Lean files are not recognized.
Solution:   Add a pattern for Lean files. (Amaan Qureshi, closes vim/vim#12177)

4a5c39fc52

vim-patch:9.0.1421: Nu files are not recognized

Problem:    Nu files are not recognized.
Solution:   Add a pattern for Nu files. (Amaan Qureshi, closes vim/vim#12172)

8aa2a37f89

vim-patch:9.0.1422: Sage files are not recognized

Problem:    Sage files are not recognized.
Solution:   Add a pattern for Sage files. (Amaan Qureshi, closes vim/vim#12176)

d0639d717b

vim-patch:9.0.1423: WebAssembly Interface Type files are not recognized

Problem:    WebAssembly Interface Type files are not recognized.
Solution:   Add a pattern for WIT files. (Amaan Qureshi, closes vim/vim#12173)

890c772036

runtime/lua/vim/filetype.lua

@@ -593,6 +593,7 @@ local extension = {
   lte = 'latte',
   ld = 'ld',
   ldif = 'ldif',
+  lean = 'lean',
   journal = 'ledger',
   ldg = 'ledger',
   ledger = 'ledger',
@@ -908,6 +909,7 @@ local extension = {
   builder = 'ruby',
   rake = 'ruby',
   rs = 'rust',
+  sage = 'sage',
   sas = 'sas',
   sass = 'sass',
   sa = 'sather',
@@ -1106,6 +1108,7 @@ local extension = {
   wdl = 'wdl',
   wm = 'webmacro',
   wbt = 'winbatch',
+  wit = 'wit',
   wml = 'wml',
   wsml = 'wsml',
   ad = 'xdefaults',
@@ -1543,6 +1546,8 @@ local filename = {
   NEWS = function(path, bufnr)
     return require('vim.filetype.detect').news(bufnr)
   end,
+  ['env.nu'] = 'nu',
+  ['config.nu'] = 'nu',
   ['.ocamlinit'] = 'ocaml',
   ['.octaverc'] = 'octave',
   octaverc = 'octave',