chezmoiexternals improvements

- Zellij version is dynamically tracked
- Added delta git/diff viewer and pager

_home/.chezmoiexternal.yaml

@@ -3,18 +3,42 @@
 # type                  string          none    External type (file, archive, archive-file, or git-repo)
 # refreshPeriod 	duration        0       Refresh period (Examples: one day (24h), one week (168h), or four weeks (672h))
 
+{{ $externals := dict -}}
+
+{{- with $repo := "dandavison/delta" -}}
+{{-   with $version := (gitHubLatestRelease $repo).GetTagName -}}
+{{-     $_ := set $externals ".local/bin/delta" (dict
+          "type" "archive-file"
+          "url" (printf "https://github.com/%s/releases/download/%s/delta-%s-x86_64-unknown-linux-musl.tar.gz" $repo $version $version)
+          "path" (printf "delta-%s-x86_64-unknown-linux-musl/delta" $version)
+          "refreshPeriod" "168h")
+-}}
+{{-   end -}}
+{{- end -}}
+
+{{- with $repo := "zellij-org/zellij" -}}
+{{-   with $version := (gitHubLatestRelease $repo).GetTagName -}}
+{{-     $_ := set $externals ".cache/chezmoi/tmp/zellij" (dict
+          "type" "archive"
+          "url" (printf "https://github.com/%s/releases/download/%s/zellij-x86_64-unknown-linux-musl.tar.gz" $repo $version)
+          "refreshPeriod" "168h")
+-}}
+{{-   end -}}
+{{- end -}}
+
+{{- $externals | toYaml }}
 ".config/sz.env/lib/ble.sh.curl":
   type: "archive"
   url: "https://github.com/akinomyoga/ble.sh/releases/download/nightly/ble-nightly.tar.xz"
   refreshPeriod: "168h"
 
+".config/sz.env/lib/delta.themes.gitconfig":
+  type: "file"
+  url: "https://raw.githubusercontent.com/dandavison/delta/refs/heads/main/themes.gitconfig"
+  refreshPeriod: "168h"
+
 ".config/sz.env/lib/bash-preexec/bash-preexec.sh":
   type: "file"
   url: "https://raw.githubusercontent.com/rcaloras/bash-preexec/master/bash-preexec.sh"
   refreshPeriod: "168h"
 
-".cache/chezmoi/tmp/zellij":
-  type: "archive"
-  url: "https://github.com/zellij-org/zellij/releases/download/v0.40.1/zellij-x86_64-unknown-linux-musl.tar.gz"
-  refreshPeriod: "168h"
-