Remove top-level README.md.in

- The generated "Contents" section isn't useful
- Non-standard, causing confusion on how to update README.md
- It's already out of sync

Remove galp3-c and darp5, as we never released the firmware due to
issues with the touchpad and keyboard. Add gaze16-3060-b variant.

Make "Schematics" a subsection of "Supported models".

Remove directory from list of paths to update in `scripts/readmes.sh`.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

scripts/readmes.sh

@@ -5,7 +5,6 @@ README_DIRS=(
     libs
     models
     tools
-    .
 )
 
 set -e
@@ -20,9 +19,7 @@ function readme_model {
     pushd "$1" > /dev/null
         cp README.md.in README.md
 
-        echo >> README.md
-        echo "## Contents" >> README.md
-        echo >> README.md
+        echo -e "\n## Contents\n" >> README.md
         "$MODELTOOL" . >> README.md
     popd > /dev/null
 }
@@ -63,9 +60,7 @@ function readme_dir {
     pushd "$1" > /dev/null
         cp README.md.in README.md
 
-        echo >> README.md
-        echo "## Contents" >> README.md
-        echo >> README.md
+        echo -e "\n## Contents\n" >> README.md
         for dir in */
         do
             if ! git check-ignore --quiet "${dir}"