Adds overview for WIP projects

Promote Ice Climber (JE) and Ice Climber (U) to top-level

- git mv _wip/Ice Climber (JE) -> Ice Climber (JE)
- git mv _wip/Ice Climber (U) -> Ice Climber (U)

- Added header.s / chr.s (one-line .incbin each)
- Added HEADER/PRG/CHR linker.cfg with proper memory layout
- Added copilot/rom.nes symlink to original ROM
- Updated Makefile for whole-ROM build (reconstructed.nes vs rom.nes)
- Updated _tools paths from ../../../_tools/ to ../../_tools/

Both projects: Pass 1/2/3 complete, byte-identical at whole-ROM level (verified).

Root OVERVIEW.md updated:
- Inventory: Ice Climber JE/U moved from _wip/ rows 23-24 to top-level rows 21-22
- Tier split: BYTE-IDENTICAL now rows 1-22 (+36), PRG-IDENTICAL rows 23-35
- Summary table: Added Ice Climber JE/U as rows 21-22
- _wip/ section: count 17 -> 15
- verify_pass1.py scope: 19 -> 22 top-level projects

All 22 top-level projects verified byte-identical.

Promote Lode Runner (U) to top-level: Pass 2/3 complete, whole-ROM byte-identical

- git mv _wip/Lode Runner (U) -> Lode Runner (U)

- Added header.s / chr.s (one-line .incbin each)
- Added HEADER/PRG/CHR linker.cfg with proper memory layout
- Added copilot/rom.nes symlink to original ROM
- Updated Makefile for whole-ROM build (reconstructed.nes vs rom.nes)

Both projects: Pass 2/3 complete, byte-identical at whole-ROM level (verified).

Root OVERVIEW.md updated:
- Inventory: Lode Runner moved from _wip/ row 25 to top-level row 23
- Tier split: BYTE-IDENTICAL now rows 1-23 (+36), PRG-IDENTICAL rows 24-35
- Summary table: Added Lode Runner as row 23 with BYTE-IDENTICAL (Pass 2/3 complete)
- _wip/ section: count 15 -> 14
- verify_pass1.py scope: 22 -> 23 top-level projects
- Audit comment count: 19 -> 22 top-level projects
- Pass 3 symbols: 19 -> 22 top-level projects

All 23 top-level projects verified byte-identical.

TODO.md updated:
- Current state: 22 -> 23 top-level projects
- _wip/ count: 15 -> 14
- verify_pass1.py scope: 22 -> 23
- Audit comment count: 19 -> 22
- Pass 3 symbols: 19 -> 22
- Label residue table: Ice Climber JE/U removed, Lode Runner added
- Five false Pass 2 claims section updated with Ice Climber & Lode Runner completions

Promote Pinball (JU) to top-level: Pass 2/3 complete, whole-ROM byte-identical

- git mv _wip/Pinball (JU) -> Pinball (JU)

- Added header.s / chr.s (one-line .incbin each)
- Added HEADER/PRG/CHR linker.cfg with proper memory layout
- Added copilot/rom.nes symlink to original ROM
- Updated Makefile for whole-ROM build (reconstructed.nes vs rom.nes)

Both projects: Pass 2/3 complete, byte-identical at whole-ROM level (verified).

Root OVERVIEW.md updated:
- Inventory: Pinball moved from _wip/ row 30 to top-level row 24
- Tier split: BYTE-IDENTICAL now rows 1-24 (+36), PRG-IDENTICAL rows 25-35
- Summary table: Added Pinball as row 24 with BYTE-IDENTICAL (Pass 2/3 complete)
- _wip/ section: count 13, rows 25-35
- verify_pass1.py scope: 23 -> 24 top-level projects
- Audit comment count: 19 -> 22 top-level projects
- Pass 3 symbols: 19 -> 22 top-level projects

All 24 top-level projects verified byte-identical.

TODO.md updated:
- Current state: 23 -> 24 top-level projects
- _wip/ count: 14 -> 13
- verify_pass1.py scope: 23 -> 24
- Label residue table updated
- Documentation follow-ups updated

Promote Millipede (U) and Popeye (JU) (PRG 0) to top-level

Promote two _wip/ projects out of _wip/ into top-level folders, each now
verified whole-ROM byte-identical against the original ROM.

- Millipede (U): moves all copilot files up, adds header.s, chr.s,
  linker.cfg with PRG+HEADER+CHR areas, rom.nes copy, and switches the
  Makefile from PRG-only cmp to whole-ROM cmp. Makefile _tools depth
  adjusted (../../../../_tools/ -> ../../_tools/).
- Popeye (JU) (PRG 0): same promotion treatment.
- AGENTS.md: update layout notes (19 top-level projects mention the
  canonical audit format; update tier counts 27->29 top-level / 9->7 _wip).
- OVERVIEW.md: root inventory table updated with the two promotions and
  re-numbered _wip rows.
- TODO.md: handoff updates.
- Remaining _wip projects: assorted pass 2/3 edits (prg.s, locals.inc,
  reconstructed.lbl, reconstructed_prg.bin) for Popeye (JU) (PRG 1),
  Pyramid (U), Raid on Bungeling Bay (U), Raid on Bungeling Bay (U) [a2].

_wip/Popeye (JU) (PRG 1)/copilot/locals.inc

@@ -201,3 +201,9 @@ ZpFC                    = $FC ; 11 refs; reads=5 writes=6; used at $CB15, CBB7,
 ZpFD                    = $FD ; 7 refs; reads=1 writes=6; used at $C7C0, C9E2, C9F1, CB35, +3 more
 ZpFE                    = $FE ; 12 refs; reads=4 writes=8; used at $DB54, DECF, DFD1, E5E6, +5 more
 ZpFF                    = $FF ; 37 refs; reads=14 writes=23; used at $D134, D3E1, D4B0, D50E, +25 more
+
+; Semantic aliases (Pass 3)
+PtrLo                  = $00        ; semantic alias for Zp00
+PtrHi                  = $01        ; semantic alias for Zp01
+Ptr2Lo                 = $02        ; semantic alias for Zp02
+Ptr2Hi                 = $03        ; semantic alias for Zp03