refactor: consolidate managed configs and switch go/tool-versions to mise

Reorganize symlinked configs from .config-source to .managed directory for better clarity on auto-updated vs manual files. Add mise config.toml to replace .tool-versions, pin zoxide and deno versions. Remove Go from PATH templates since it's now managed via mise.

docs/symlink-patterns.md

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+# Symlink Patterns
+
+This repository uses four distinct symlink patterns for different use cases.
+
+## 1. Managed Configs (`.managed/`)
+
+**Use for**: Config files that are auto-updated by tools OR shared across multiple platforms
+
+**Location**: `chezmoi/home/.managed/<app>/<file>`  
+**Template syntax**: `{{ .chezmoi.sourceDir }}/.managed/<app>/<file>`  
+**Important**: `.managed` is listed in `home/.chezmoiignore` to prevent copying to home
+
+**Examples**:
+```
+~/.config/mise/config.toml → .managed/mise/config.toml
+~/.config/lazygit/config.yml → .managed/lazygit/config.yml
+~/.config/Code/User/settings.json → .managed/vscode/settings.linux.json
+~/AppData/Roaming/Cursor/User/settings.json → .managed/cursor/settings.windows.json
+```
+
+**How it works**: 
+1. Tool modifies symlink target: `~/.config/mise/config.toml`
+2. Changes write to: `chezmoi/.managed/mise/config.toml`
+3. Run `chezmoi cd && git add .managed/ && git commit` to track changes
+4. Syncs across machines via chezmoi
+
+**Why**: Prevents source file from being copied to home. Tools can modify configs and changes are automatically tracked in the chezmoi repo.
+
+---
+
+## 2. Root-Level Configs
+
+**Use for**: Simple auto-updated files at home root that don't need multi-location sharing
+
+**Location**: `chezmoi/home/<filename>` (+ entry in `.chezmoiignore`)  
+**Template syntax**: `{{ .chezmoi.sourceDir }}/<filename>`
+
+**Examples**:
+```
+~/.claude/settings.json → claude-settings.json
+Build/validation scripts in hooks/ directory
+```
+
+**Why**: Simpler than `.managed/` for single-purpose files at home root. Same principle (ignored source, symlinked target), just different organization.
+
+---
+
+## 3. Internal Code Sharing
+
+**Use for**: Sharing code/docs between locations within this repo (DRY principle)
+
+**Location**: Varies (typically special directories like `.claude/`)  
+**Template syntax**: Relative paths like `../../../.claude/commands/file.md`
+
+**Examples**:
+```
+~/.config/opencode/command/commit-staged.md → ~/.claude/commands/commit-staged.md
+~/.config/opencode/AGENTS.md → ~/.claude/CLAUDE.md
+```
+
+**Why**: Single source of truth for shared commands/documentation. Changes in one location automatically reflected in all symlinked locations.
+
+---
+
+## 4. External Symlinks
+
+**Use for**: Links to files outside home directory (cross-filesystem, WSL → Windows)
+
+**Location**: External absolute paths  
+**Template syntax**: Absolute paths like `/mnt/c/Users/<user>/AppData/...`  
+**Conditional**: Usually wrapped in OS/environment checks
+
+**Examples**:
+```
+~/.gnupg → /mnt/c/Users/Xevion/AppData/Roaming/gnupg  (WSL only)
+```
+
+**Why**: Access Windows configs from WSL without duplication. Shares actual Windows application state with WSL environment.