Sample prompts: Rename prompts named after a single person

Unless that person directly contributed the prompt.

We name them after a feature - the Scales prompt feature a ">>>" which
kinda looks like fish scales, the "Arrow" prompt starts with a
prominent "➜".

Naming them after people looks like an endorsement of that particular
person, and like they are someone to look up to, especially when they
aren't involved with the project.

The "terlar" and "acidhub" prompts stay for now because they
contributed the prompt themselves, they are also much less prominent.

share/tools/web_config/sample_prompts/arrow.fish

@@ -1,11 +1,11 @@
-# name: Robbyrussell
+# name: Arrow
 # author: Bruno Ferreira Pinto, Pawel Zubrycki
 
 function fish_prompt
     set -l __last_command_exit_status $status
 
-    if not set -q -g __fish_robbyrussell_functions_defined
-        set -g __fish_robbyrussell_functions_defined
+    if not set -q -g __fish_arrow_functions_defined
+        set -g __fish_arrow_functions_defined
         function _git_branch_name
             set -l branch (git symbolic-ref --quiet HEAD 2>/dev/null)
             if set -q branch[1]

share/tools/web_config/sample_prompts/scales.fish

@@ -1,4 +1,4 @@
-# name: Sorin
+# name: Scales
 # author: Leonard Hecker <leonard@hecker.io>
 
 # Sources: