vim-patch:9.1.1829: filetype: KerML and SysML files are not recognized (#36042)

Problem:  filetype: KerML and SysML files are not recognized
Solution: Detect *.kerml as kerml filetype, detect *.sysml as sysml
          filetype, include a kerml and sysml filetype plugin
          (Daumantas Kavolis)

closes: vim/vim#18476

b73ccf7ff0

Co-authored-by: Daumantas Kavolis <daumantas.kavolis@sensmetry.com>

runtime/lua/vim/filetype.lua

@@ -672,6 +672,7 @@ local extension = {
   kl = 'karel',
   KL = 'karel',
   kdl = 'kdl',
+  kerml = 'kerml',
   kv = 'kivy',
   kix = 'kix',
   kts = 'kotlin',
@@ -1216,6 +1217,7 @@ local extension = {
   sys = detect.sys,
   Sys = detect.sys,
   SYS = detect.sys,
+  sysml = 'sysml',
   svh = 'systemverilog',
   sv = 'systemverilog',
   cmm = 'trace32',