docs(docs): documented RFC2119 terms to stay uppercase without bold

- Removed markdown bold from RFC 2119 MUST/SHOULD/REQUIRED across agent, tool, system, compaction, and memory prompts.
- Updated SKILL guidance to require uppercase RFC 2119 terms without bold emphasis.
- Renamed `boldRfc2119Keywords` to `stripRfc2119Bold` and made prompt formatting strip `**keyword**` markers.
- Preserved substantive prompt instruction wording while switching emphasis-only formatting in markdown templates.

packages/coding-agent/scripts/format-prompts.ts

@@ -25,7 +25,7 @@ const PROMPT_DIRS = [PROMPTS_DIR, COMMIT_PROMPTS_DIR, AGENTIC_PROMPTS_DIR];
 const PROMPT_FORMAT_OPTIONS = {
 	renderPhase: "pre-render",
 	replaceAsciiSymbols: true,
-	boldRfc2119Keywords: true,
+	stripRfc2119Bold: true,
 } as const;
 
 async function main() {