feat(age): add age filter

dot_gitconfig.tmpl

@@ -11,12 +11,6 @@
         colorMoved = default
         tool = difftastic
 
-[pager]
-        difftool = true
-
-[pull]
-        rebase = true
-
 [difftool]
         prompt = false
 
@@ -31,23 +25,37 @@
         side-by-side = true
         inspect-raw-lines = false
 
-[diff]
+[pager]
+        difftool = true
+
+[pull]
+        rebase = true
+
+[push]
+	autoSetupRemote = true
 
 [interactive]
         diffFilter = delta --color-only
 
 [alias]
         dft = difftool
+
 [credential]
 	helper = rbw
-[push]
-	autoSetupRemote = true
+
+[commit]
+	gpgsign = true
+
+[init]
+	defaultBranch = main
+
 [filter "lfs"]
 	clean = git-lfs clean -- %f
 	smudge = git-lfs smudge -- %f
 	process = git-lfs filter-process
 	required = true
-[commit]
-	gpgsign = true
-[init]
-	defaultBranch = main
+
+[filter "age"]
+        clean = git-age clean -- %f
+        smudge = git-age smudge -- %f
+        required = true