docs: add English README for project-bootstrap; translate root README

- skills/project-bootstrap/README.md: new English README (modes,
  triggers, prerequisites, layout, install, see-also).
- README.md: translated to English; both root READMEs cross-link.
- README.ru.md: original Russian preserved (renamed from README.md);
  fixed broken `.wiki/source/repo-layout.md` link to point at the real
  path under `.wiki/concepts/`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

README.md

@@ -1,64 +1,81 @@
 # claude-skills
 
-Совместное хранилище и мастерская навыков для Claude.
+> Russian version: [README.ru.md](README.ru.md).
+
+Joint workshop and storage for Claude skills.
 
 ## About
 
-Здесь мы с Claude вместе разрабатываем, отлаживаем и храним скиллы:
+A shared workspace where Claude and I author, debug, and ship skills together:
 
-- **`skills/`** — редактируемые исходники (markdown + ассеты), source of truth
-- **`dist/`** — собранные `.skill` архивы, закоммичены в репо
-- **`scripts/`** — утилиты: `build.sh` (исходник → `.skill`), `install.sh` (исходник → `~/.claude/skills/`)
-- **`.wiki/`**, **`.tasks/`** — рабочие материалы и доска задач
+- **`skills/`** — editable sources (markdown + assets), the source of truth
+- **`dist/`** — built `.skill` archives, committed to the repo
+- **`scripts/`** — utilities: `build.sh` (source → `.skill`), `install.sh` (source → `~/.claude/skills/`)
+- **`.wiki/`**, **`.tasks/`** — working notes and the task board
 
 ## Quick start
 
-### Установить скиллы на новом компе
+### Install skills on a fresh machine
+
+**Windows (PowerShell):**
+
+```powershell
+git clone <repo> claude-skills
+cd claude-skills
+bash scripts/install.sh           # copies every skills/* into ~/.claude/skills/
+# or only specific ones:
+bash scripts/install.sh caveman wiki-maintainer
+```
+
+**Linux / macOS (bash):**
 
 ```bash
 git clone <repo> claude-skills
 cd claude-skills
-bash scripts/install.sh           # копирует все skills/* в ~/.claude/skills/
-# или конкретные:
+bash scripts/install.sh           # copies every skills/* into ~/.claude/skills/
+# or only specific ones:
 bash scripts/install.sh caveman wiki-maintainer
 ```
 
-Цель установки можно переопределить переменной `CLAUDE_SKILLS_DIR=/path bash scripts/install.sh`.
+The install target can be overridden with `CLAUDE_SKILLS_DIR=/path bash scripts/install.sh`.
 
-### Отредактировать скилл
+> `install.sh` works on Windows under git-bash. A native `install.ps1` is on the task board but not yet implemented.
+
+### Edit a skill
 
 ```bash
-# 1. Правишь skills/<name>/SKILL.md (или ассеты)
-# 2. Раскатываешь правки в живые скиллы:
+# 1. Edit skills/<name>/SKILL.md (or its assets).
+# 2. Push the changes into the live skill folder:
 bash scripts/install.sh <name>
-# 3. Пересобираешь архив (опц., но удобно делать перед коммитом):
+# 3. Rebuild the archive (optional, but handy before a commit):
 bash scripts/build.sh <name>
 ```
 
-### Собрать `.skill` архивы
+### Build `.skill` archives
 
 ```bash
-bash scripts/build.sh                 # все
-bash scripts/build.sh caveman          # один
+bash scripts/build.sh                 # all skills
+bash scripts/build.sh caveman         # one skill
 ```
 
-`build.sh` использует `zip` если он есть (Linux/macOS) или делегирует в
-`scripts/build.ps1` через PowerShell (Windows без `zip`). На Windows
-можно сразу запускать `powershell scripts/build.ps1`.
+`build.sh` uses `zip` when it's available (Linux/macOS) or delegates to
+`scripts/build.ps1` via PowerShell (Windows without `zip`). On Windows you
+can also run `powershell scripts/build.ps1` directly.
 
 ## Layout
 
 ```
 claude-skills/
-├── skills/                 ← исходники (по папке на скилл)
-├── dist/                   ← .skill архивы (коммитятся)
+├── skills/                 ← sources (one folder per skill)
+├── dist/                   ← .skill archives (committed)
 ├── scripts/
 │   ├── build.sh / build.ps1
 │   └── install.sh
-├── .wiki/                  ← дизайн-доки, заметки
+├── .wiki/                  ← design docs, notes
 ├── .tasks/                 ← STATUS.md
 ├── CLAUDE.md
-└── README.md
+└── README.md               (this file — see README.ru.md for Russian)
 ```
 
-Подробнее про принципы и решения — в [`.wiki/source/repo-layout.md`](.wiki/source/repo-layout.md).
+For the principles and decisions behind this layout see
+[`.wiki/concepts/repo-layout.md`](.wiki/concepts/repo-layout.md).