Add rails_icons (Tabler) for SVG iconography

Vendors the Tabler outline/filled icon sets via rails_icons' sync
mechanism rather than a hand-rolled SVG set or a webfont -- this app
had no icon system of any kind before. Icons are committed like any
other static asset; re-syncing is only needed when adding an icon
that isn't vendored yet, via the new `make sync_icons` target.

1 files changed, 21 insertions, 0 deletions

diff --git a/app/assets/svg/icons/tabler/filled/brightness-down.svg b/app/assets/svg/icons/tabler/filled/brightness-down.svg
new file mode 100644
index 00000000..e530a12a
--- /dev/null
+++ b/app/assets/svg/icons/tabler/filled/brightness-down.svg
@@ -0,0 +1,21 @@
+<!--
+version: "2.26"
+unicode: "fb23"
+-->
+<svg
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
+  fill="currentColor"
+>
+  <path d="M12 8a4 4 0 1 1 -3.995 4.2l-.005 -.2l.005 -.2a4 4 0 0 1 3.995 -3.8z" />
+  <path d="M12 4a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M17 6a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M19 11a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M17 16a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M12 18a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M7 16a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M5 11a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+  <path d="M7 6a1 1 0 0 1 .993 .883l.007 .127a1 1 0 0 1 -1.993 .117l-.007 -.127a1 1 0 0 1 1 -1z" />
+</svg>