feat(lint): add vale-config skill

Covers Vale install and .vale.ini setup — StylesPath, built-in/
third-party/custom styles, BasedOnStyles activation. Setup half of
Vale support; vale-run (running/interpreting) is a separate skill.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FxG5T8EJDgkABXxuneuFfn

plugins/lint/docs/research/docs/vale/troubleshooting.md

@@ -0,0 +1,56 @@
+---
+topic: troubleshooting
+source_keys:
+  - context7-websites-vale-sh
+---
+
+## Suppressing False Positives Inline
+
+Vale supports inline markup comments to disable checks for a section of content. Syntax varies by format:
+
+Markdown/MDX:
+```mdx
+{/* vale off */}
+This text will be ignored.
+{/* vale on */}
+```
+
+Org mode:
+```org
+# vale off
+This text will be ignored.
+# vale on
+```
+
+## Disabling a Specific Rule for Specific Matches
+
+Rather than disabling all checks, target one rule and specific known-exception strings, then re-enable:
+
+```mdx
+{/* vale Style.Redundancy["ACT test","OTHER"] = NO */}
+This is some text ACT test
+{/* vale Style.Redundancy["ACT test","OTHER"] = YES */}
+```
+
+This is the preferred fix for recurring false positives on specific terms — it keeps the rule active everywhere else instead of disabling it project-wide.
+
+## Ignoring Words in Spell Check
+
+The `spelling` check accepts an `ignore` list of external plain-text files, so known project-specific terms don't need touching the dictionary:
+
+```yaml
+extends: spelling
+message: "Did you really mean '%s'?"
+level: error
+ignore:
+  - ignore1.txt
+  - ignore2.txt
+```
+
+## Plain-Text Fallback
+
+If a file's syntax-aware parsing produces noisy/incorrect results (e.g. an unsupported or malformed format), rerun with `--ignore-syntax` to treat it as plain text instead of relying on the format-specific parser.
+
+## CI Failing Unexpectedly
+
+If a CI job fails solely because Vale returns a non-zero exit code on found alerts (not because the content is actually wrong for that pipeline stage), add `--no-exit` rather than suppressing the rule itself — this preserves the lint output while not gating the build on it.