feat: add SDKMAN integration and improve mise/tool configuration

- Add SDKMAN initialization to bashrc for Java SDK management
- Create Fish shell wrapper function for SDKMAN commands
- Switch from lazy-loading to automatic mise activation in Fish
- Clean up fish_plugins comments for clarity
- Add pnpm to mise tool-versions
- Enable Shift+Enter in Kitty for Claude Code multi-line prompts
- Make update_pre.ts hook executable

home/dot_config/fish/conf.d/mise.fish

@@ -0,0 +1,4 @@
+# Activate mise automatically on shell startup
+if command -q mise
+    mise activate fish | source
+end