feat(pm): add fingerprint ignores for install command

[fengmk2]

Install benchmark on outline

From 4.991s to 0.052s

Before

# first time
executed task finished, path_reads: 121036, path_writes: 107260, outputs: 7, exit_status: exit status: 0

vite i  10.38s user 72.38s system 484% cpu 17.081 total

# cache hit
vite i  0.43s user 68.01s system 1371% cpu 4.991 total

After

# first time
executed task finished, path_reads: 121036, path_writes: 107260, outputs: 7, exit_status: exit status: 0
PostRunFingerprint created, got 51 inputs, fingerprint_ignores: Some(["**/*", "!**/package.json", "!**/.npmrc", "!**/.yarnrc", "!**/.yarnrc.yml", "!**/yarn.config.cjs", "!**/yarn.lock", "!**/.yarn/**/*", "!**/.pnp.cjs", "**/node_modules/**/*", "!**/node_modules", "!**/node_modules/@*", "**/node_modules/**/node_modules/**"])

vite i  10.31s user 20.77s system 261% cpu 11.889 total

# cache hit
vite i  0.03s user 0.03s system 113% cpu 0.052 total

[fengmk2]

• feat(pm): add fingerprint ignores for install command #216 👈 (View in Graphite)
• feat(task): add cache fingerprint ignore patterns #214
• main

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[fengmk2]

Merge activity

• Oct 13, 4:32 AM UTC: A user started a stack merge that includes this pull request via Graphite.
• Oct 13, 4:34 AM UTC: Graphite couldn't merge this PR because it had merge conflicts.
• Oct 13, 4:41 AM UTC: @fengmk2 merged this pull request with Graphite.

[Copilot]

Pull Request Overview

This PR adds fingerprint ignores for the install command to improve caching performance by reducing unnecessary file system monitoring. The implementation provides package manager-specific patterns to include only relevant files while ignoring most others during fingerprinting.

• Added fingerprint ignores configuration to significantly reduce file system reads during install operations
• Updated install command to use package manager-specific ignore patterns
• Fixed pnpmfile.cjs detection to support both modern (.pnpmfile.cjs) and legacy (pnpmfile.cjs) formats

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
crates/vite_task/src/install.rs	Modified install command to use fingerprint ignores instead of None
crates/vite_package_manager/src/package_manager.rs	Added get_fingerprint_ignores method with package manager-specific patterns and updated pnpmfile detection

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