fix: add --no-gitignore extraction opt-out

[Mzt00]

Summary

Adds graphify extract <path> --no-gitignore for generated or transpiled source that is excluded from Git but still belongs in the graph. Fixes #1971

With the flag, Graphify:

• skips root, ancestor, and nested .gitignore files;
• skips $GIT_DIR/info/exclude;
• still prioritizes .graphifyignore explicit --exclude patterns, noise filters, and sensitive-file checks; and
• persists the setting for later update, watch, and hook rebuilds.

Default extraction behavior is unchanged.

Implementation

The detector APIs now accept a keyword-only gitignore: bool = True. The extract CLI passes False for both full and incremental scans when --no-gitignore is present.

The setting is stored in graphify-out/.graphify_build.json. Rebuild and watch paths read it before rescanning or filtering filesystem events, preventing generated files from disappearing after the initial extraction. Existing build configs without the key default to True.

Why .graphifyignore remains active

The staged loader change separates Graphify-owned rules from VCS-owned rules. With gitignore=False, _load_dir_own_ignore() loads only .graphifyignore; _load_graphifyignore() skips .git/info/exclude but still loads .graphifyignore at ancestor, root, and nested-directory anchors. detect() and watch/rebuild callers pass the same setting through every scan path.

The end-to-end test confirms this behavior: Git-ignored Gen.cs and Local.cs are included, while .graphifyignore-excluded Hidden.cs remains absent.

Behavior

Rule source	Default	--no-gitignore
.gitignore	Applied	Skipped
.git/info/exclude	Applied	Skipped
.graphifyignore	Applied	Applied
--exclude	Applied	Applied
Noise and sensitive-file filters	Applied	Applied

Tests and validation

• End-to-end extraction verifies VCS-ignored C# is included while .graphifyignore remains active.
• Rebuild coverage verifies the persisted setting continues to include generated code.
• Existing tests guard default Git-ignore behavior and persisted explicit exclusions.
• Ruff passed for all changed Python files.
• Focused regression set: 7 passed.

[safishamsi]

Landed on v8 (ships in 0.9.19) in f17e2c5, cherry-picked to preserve your authorship. Thanks @MZT006 — --no-gitignore disables only VCS ignore rules while keeping .graphifyignore and the secret/sensitive screens. Follow-up added on top (caa6f9e): the setting now persists and is not clobbered back on by a later flag-less graphify extract, so git-ignored code does not silently disappear (the #1971 complaint).

[safishamsi]

Credit correction: this fix is by @Mzt00 (I earlier mistyped @MZT006, an unrelated user — apologies to them). Report was @JensD-git. Fixed in the changelog and 0.9.19 release notes.