docs: Pages site cleanup step 1 - curated publish set + cross-link fixes (#51)

* docs: step 1 of the docs/site cleanup - whitelist Pages site config, fix cross-links to excluded docs, drop game-behavior-reference index bullet

Publish only the curated set (index/building/internals/porting-notes/
dev-process/agentic-development); everything else under docs/ stays in
the repo but out of the Pages build and sitemap. Cross-links from the
published pages to excluded docs now point at GitHub blob URLs so they
still resolve. No content rewrite yet -- steps 2-5 (README update, per-
page descriptions, light copy passes, repo hygiene) remain.

Claude-Session: https://claude.ai/code/session_016TaKy6AAsVUTfjkhrX6CjG

* docs(dev-process): add §6 -- keep PR/git-history noise low

Squash-merge single-purpose/docs PRs, batch same-session docs updates
into one branch instead of one-PR-per-finding, keep unrelated
housekeeping off active branches, declare stacked-PR dependencies, and
triage the open-PR list every session -- close stale PRs (superseded
by newer main content) rather than force-merging or endlessly
rebasing them.

Prompted by this session's PR #26: real conflicts against main because
D191/D193/D149 were all fixed/closed since it was opened; closed
rather than rebased.

docs/internals.md

@@ -5,8 +5,9 @@
 > external references. The phased plan in section 8 is largely done through
 > Phase 2 — for current status see the
 > [README](https://github.com/jkdansereau/goldeneye-pc-port#status) and
-> [`dev/LEVEL-STATUS.md`](dev/LEVEL-STATUS.md); for the blow-by-blow finding
-> log see [`dev/findings.md`](dev/findings.md).
+> [`dev/LEVEL-STATUS.md`](https://github.com/jkdansereau/goldeneye-pc-port/blob/main/docs/dev/LEVEL-STATUS.md);
+> for the blow-by-blow finding log see
+> [`dev/findings.md`](https://github.com/jkdansereau/goldeneye-pc-port/blob/main/docs/dev/findings.md).
 
 This document captures the research done to plan a PC port of
 GoldenEye 007, based on the decompilation this repository is forked from