Remove and recreate shims in asdf install step (#83)

@hochdave recently ran into an issue where his pre-commit shim was still
pointing to his old non-existant brew-installed version of asdf:
```
dave:wordsmith-proxy dave.hoch$ git commit -m 'add token usage'
/Users/dave.hoch/.asdf/shims/pre-commit: line 4: /opt/homebrew/Cellar/asdf/0.13.1/libexec/bin/asdf: No such file or directory
/Users/dave.hoch/.asdf/shims/pre-commit: line 4: exec: /opt/homebrew/Cellar/asdf/0.13.1/libexec/bin/asdf: cannot execute: No such file or directory
One or more pre-commit hooks failed.
```

`asdf reshim` didn't fix the issue, because it doesn't recreate existing
shims.

This PR removes the whole existing shim directory and recreates it with
`asdf reshim`.

VERSION

@@ -1 +1 @@
-0.1.44
+0.1.45

formula/ih-core.rb

@@ -1,5 +1,5 @@
 class IhCore < Formula
-  VERSION="0.1.44"
+  VERSION="0.1.45"
   desc "Brew formula for installing core tools used at Included Health engineering."
   homepage "https://github.com/ConsultingMD/homebrew-ih-public"
   license "CC BY-NC-ND 4.0"

lib/core/asdf/step.sh

@@ -55,6 +55,27 @@ function ih::setup::core.asdf::deps() {
   echo "core.shell core.git"
 }
 
+function recreate_shims() {
+  ih::log::info "Removing existing asdf shims..."
+  if [ -d "$HOME/.asdf/shims" ]; then
+    rm -f "$HOME/.asdf/shims"/*
+  else
+    ih::log::debug "Shims directory not found."
+    return 1
+  fi
+
+  ih::log::info "Generating new asdf shims..."
+  asdf reshim
+
+  local EXIT_CODE=$?
+  if [ $EXIT_CODE -ne 0 ]; then
+    ih::log::error "Failed to recreate asdf shims."
+    return $EXIT_CODE
+  fi
+
+  ih::log::info "Successfully recreated asdf shims."
+}
+
 function ih::setup::core.asdf::install() {
 
   if ! command -v asdf; then
@@ -96,6 +117,8 @@ function ih::setup::core.asdf::install() {
     fi
   done <<<"$DESIRED_PLUGINS"
 
+  recreate_shims
+
   ih::log::info "Copying augment file for shell"
   cp -f "$ASDF_SH_TEMPLATE_PATH" "$ASDF_SH_PATH"