Refactor cache configuration from cacheScripts to flexible cache option (#191)

## Summary
This PR replaces the simple boolean `cacheScripts` configuration option
with a more flexible `cache` configuration that supports both boolean
and detailed object formats, enabling independent control over caching
for package.json scripts and task entries.

## Key Changes

- **New `UserGlobalCacheConfig` enum**: Replaces `cache_scripts: bool`
with a flexible configuration that accepts:
  - `true` / `false` (boolean shorthand)
  - `{ scripts?: bool, tasks?: bool }` (detailed configuration)
  
- **New `ResolvedGlobalCacheConfig` struct**: Provides a resolution
mechanism with sensible defaults:
  - `scripts`: defaults to `false`
  - `tasks`: defaults to `true`

- **Configuration field rename**: `UserRunConfig.cache_scripts` →
`UserRunConfig.cache`

- **Error message update**:
`TaskGraphLoadError::CacheScriptsInNonRootPackage` →
`TaskGraphLoadError::CacheInNonRootPackage`

- **TypeScript types**: Generated `UserGlobalCacheConfig` type in
`run-config.ts` with comprehensive documentation

- **Test fixtures**: Added two new test fixtures demonstrating the new
configuration:
- `cache-true-no-force-enable`: Shows how `cache: true` with individual
task `cache: false` overrides work
- `cache-tasks-disabled`: Shows how `cache: { tasks: false }` disables
all task caching while respecting individual task settings

- **Test coverage**: Added comprehensive unit tests for all
configuration variants (boolean true/false, detailed with various field
combinations, defaults, and error cases)

- **Migration**: Updated all existing test fixtures from `cacheScripts`
to `cache` format

## Implementation Details

The resolution logic ensures backward compatibility while providing more
granular control:
- When `cache` is omitted, defaults to `{ scripts: false, tasks: true }`
- Boolean `true` expands to `{ scripts: true, tasks: true }`
- Boolean `false` expands to `{ scripts: false, tasks: false }`
- Detailed objects use provided values with appropriate defaults for
missing fields

https://claude.ai/code/session_01AYbt3E5j8Adk9NB7Sprkah

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: branchseer

crates/vite_task_bin/tests/e2e_snapshots/fixtures/associate-existing-cache/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }

crates/vite_task_bin/tests/e2e_snapshots/fixtures/builtin-different-cwd/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }

crates/vite_task_bin/tests/e2e_snapshots/fixtures/builtin-non-zero-exit/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }

crates/vite_task_bin/tests/e2e_snapshots/fixtures/cache-disabled/vite-task.json

@@ -1,5 +1,5 @@
 {
-  "cacheScripts": true,
+  "cache": true,
   "tasks": {
     "no-cache-task": {
       "command": "print-file test.txt",

crates/vite_task_bin/tests/e2e_snapshots/fixtures/cache-miss-command-change/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }

crates/vite_task_bin/tests/e2e_snapshots/fixtures/cache-miss-reasons/vite-task.json

@@ -1,5 +1,5 @@
 {
-  "cacheScripts": true,
+  "cache": true,
   "tasks": {
     "test": {
       "command": "print-file test.txt",

crates/vite_task_bin/tests/e2e_snapshots/fixtures/cache-subcommand/vite-task.json

@@ -1,5 +1,5 @@
 {
-  "cacheScripts": true,
+  "cache": true,
   "tasks": {
     "cached-task": {
       "command": "print-file test.txt",

crates/vite_task_bin/tests/e2e_snapshots/fixtures/colon-in-name/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }

crates/vite_task_bin/tests/e2e_snapshots/fixtures/e2e-env-test/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }

crates/vite_task_bin/tests/e2e_snapshots/fixtures/e2e-lint-cache/vite-task.json

@@ -1,3 +1,3 @@
 {
-  "cacheScripts": true
+  "cache": true
 }