config(fish): add fish completions for cli tools

dot_config/fish/functions/gho.fish

@@ -0,0 +1,23 @@
+function gho
+    set -l vaults ~/Documents/Obsidian/Personal ~/Documents/Obsidian/Walletbase ~/Documents/Obsidian/Research
+
+    set -l selection (ghq list | fzf --prompt="repo: " --tiebreak=end \
+        --bind "tab:transform:if test \"\$FZF_PROMPT\" = 'repo: '
+                echo 'change-prompt(vault: )+reload(printf %s\n $vaults)'
+            else
+                echo 'change-prompt(repo: )+reload(ghq list)'
+            end")
+    or return
+
+    # Vault entries are absolute paths; ghq entries are host/user/repo
+    if string match -q '/*' -- $selection
+        cd $selection
+    else
+        cd (ghq root)/$selection
+    end
+
+    clear
+    if test -d .git
+        onefetch
+    end
+end