feat: implement agent-os standards system and feature planning tools

- Split CODING_GUIDELINES.md into 19 indexed standards files under .claude/standards/
  - 9 from CODING_GUIDELINES (conventions, powershell, security, api, git, gururmm)
  - 10 from session log tribal knowledge (syncro, ssh, gitea, python, client, gururmm)
- Add .claude/standards/index.yml for cheap relevance-based lookup
- Add /inject-standards command: load targeted standards per task instead of full guidelines
- Add /shape-spec command: pre-implementation spec for GuruRMM features (plan.md,
  shape.md, references.md, standards.md) with mandatory out-of-scope gate
- Add docs/tech-stack.md and docs/mission.md for ClaudeTools API
- Add projects/msp-tools/guru-rmm/docs/tech-stack.md and mission.md for GuruRMM
- Update CLAUDE.md commands table with /inject-standards and /shape-spec

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/standards/conventions/no-emojis.md

@@ -0,0 +1,37 @@
+---
+name: no-emojis
+description: Never use emojis in code, scripts, config, or output; use ASCII markers instead
+applies-to: all
+---
+
+# No Emojis — Ever
+
+Never use emojis in code, scripts, config files, log messages, or output strings.
+
+## Rationale
+
+Causes PowerShell parsing errors, encoding issues, and terminal rendering problems. PowerShell profile scripts that interact with emoji characters can trigger codepage changes (`chcp 65001`) which alter the Claude Code CLI font and break rendering. Emoji bytes can also corrupt log files that are read by tools expecting ASCII or Latin-1.
+
+## Use instead
+
+```
+[OK] [SUCCESS] [INFO] [WARNING] [ERROR] [CRITICAL]
+```
+
+These are the mandatory ASCII status markers for all scripts, tools, session logs, commit messages, and any output visible in a terminal or log file.
+
+## Exception
+
+User-facing web UI with proper UTF-8 handling. If a React component or HTML page is intentionally rendering emoji for end users, that is acceptable. The prohibition is on everything else: server logs, CLI output, scripts, config files, PowerShell, Bash, Python print statements, and any text that may flow through a terminal.
+
+## Scope
+
+This applies to:
+- All scripts (PowerShell, Bash, Python)
+- Config files (YAML, TOML, JSON comments)
+- Log messages and print statements
+- Git commit messages
+- Markdown documentation in `.claude/`
+- Syncro ticket comments
+- Session logs
+- Any output written to a terminal or log file