[MetaROR] Structural reorganisation & scope

Larger structural reorganisation (mostly R3) plus the scope-statement decision. These moves are bigger than per-chapter fixes and interact with each other, so plan them together rather than piecemeal.

**Progress:** the lower-risk moves are implemented in PR #33 (branch `restructure/metaror-issue-27`); checked items below are done there. The Ch1→Ch2 merge, the §5.2/§5.3 moves, and the Ch7/Ch8 reorganisations are not in that batch.

**Structural reorganisation:**
- [x] Reorder Sections 2.3 and 2.4 to put Reproduction before Replication (matching chronological order and the book title), and rename Chapter 2 to "Reproductions and Replications". (R3) — *PR #33: chapter renamed reproduction-first to "Understanding Reproductions and Replications".*
- [x] Integrate Section 2.3 (Types of replication) and Section 2.4 into Chapter 4 to avoid duplication and reduce the inconsistency problem. (R3) — *PR #33: duplicated "Types of reproduction" removed (the typology lives with Table 4.1 in Ch4); the conceptual discussion stays in Ch2, retitled "Closeness and Similarity".*
- [ ] #48
- [x] Split Table 7.1 — move the reproduction-success part into a separate table within the reproduction chapter. (R3) *(interacts with the Chapter 7 restructuring decision in Points for discussion)*
- [ ] #50
- [x] Move the checklist (Chapter 10) to an Appendix and discuss it in a conclusion section, rather than a standalone Part IV. (R3) — *PR #33: checklist moved to `appendix_checklist.qmd`, cross-referenced from the Conclusion.*
- [x] Move Section 4.1 (Post-Publication Conversations) to Chapter 3 (selecting studies for replication). (R1) — *PR #33.*
- [ ] #52
- [x] ~~Merge Sections 5.5 (Deviations) and 5.6 (Analysis) — deviations typically arise during analysis. (R3)~~ — **Reconsidered and reversed.** Deviations is kept as its own section, placed before Analysis (plan → deviations → results), parallel to the replication chapter. Framing it as something that "arises during analysis" undercut the planned-and-reported norm. See PR #33 and the comment above.

**Scope:**
- [ ] Consider a scope-limiting statement — if the handbook is limited to social-science disciplines, include that in the title. (R1) <- WON'T DO not a strict limit, e.g. fmri and digital humanities - and openness to extend further

**Handled in other issues** (decisions with reviewer conflict):
- Merge Chapter 7 into Chapter 6 vs subsections 7.1–7.5 → *Points for discussion*
- Section 6.5 (Adversarial Collaborations) — expand or remove → *Points for discussion*