chore: add GitHub skills and instruction files for support-query-builder

[Copilot]

Adds structured AI agent guidance (instruction files and skills) to .github/ following the same pattern as AniTrend/support-arch, tailored to this repo's module layout and toolchain.

Instruction files (.github/instructions/)

• context.instructions.md — Rewritten from the old architecture overview into a dense, heuristic-driven reference: module groups, dependency direction, package expectations, build/tooling facts, and working rules. Explicitly documents the jenv + .java-version = 21.0.8 JDK pinning contract and the required alignment with ProjectConfiguration.kt (JavaVersion.VERSION_21 / JvmTarget.JVM_21).
• build-logic.instructions.md — Scoped to build.gradle.kts, buildSrc/**, libs.versions.toml, and workflow files. Covers module classification (JVM-only vs Android library), shared plugin conventions, and where each build concern lives.
• context-maintenance.instructions.md — Instructs agents to update instructions, skills, and README in the same patch when architecture, module graph, or public API changes land.
• kdoc-dokka.instructions.md — KDoc standards for this library's specific surface: builder call sequences, annotation types, extension functions, and Room/SQLite lifecycle expectations.

Skills (.github/skills/)

• jenv-gradle-low-ram — Step-by-step procedure to align jenv to .java-version and invoke Gradle safely under memory pressure (--no-daemon --max-workers=2 -Xmx1536m). Includes KAPT-specific OOM tip and jenv install reference.
• support-query-builder-build-dependencies + references/build-map.md — Maps every build concern (module includes, Android/JVM defaults, dependency strategy, Spotless, Maven publishing, KAPT wiring) to its owning file. Covers module dependency snapshot and edit strategy.
• support-query-builder-reference-map + references/module-map.md — Module placement guide: all five modules with package roots, dependency direction, placement heuristics, and consumer notes.
• support-query-builder-kdoc-dokka + references/kdoc-checklist.md — KDoc templates for classes, builder/DSL functions, properties, extension functions, and annotation types, with repo-specific reminders.

.java-version (21.0.8) already existed; no change required.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

_{TIP This summary will be updated as you push new changes. Give us feedback}