feat(tools): Add dispatcher script to transparently access tools r/12

Initial version of tool provider via Nix. This requires two separate
steps for adding a new tool:

1. New symlink in tools/bin to point at the dispatch script.
2. Mapping of tool to Nix package set attribute in dispatch script.

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/bin/git-appraise b/tools/bin/git-appraise
new file mode 120000
index 0000000000..8390ec9c96
--- /dev/null
+++ b/tools/bin/git-appraise
@@ -0,0 +1 @@
+__dispatch.sh
\ No newline at end of file