Replace yq with pure bash for TOML parsing (#4171)

* Replace yq with pure bash for TOML parsing

The yq-based parsing only worked with jq/yq v3 and broke with go-yq v4.
This change removes the yq and uses bash for parsing. Some additional improvments:
- Handles single and double quoted values
- Strips inline comments (e.g. "#hex" #comment)

* Remove the no-longer-needed yq packages

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

install/omarchy-base.packages

@@ -144,5 +144,4 @@ xmlstarlet
 xournalpp
 yaru-icon-theme
 yay
-yq
 zoxide