1.1.0: fix Live Preview crash, add Reading View inline support, birthday labels

- Fix RangeSetBuilder ordering crash: inline and fenced-block decorations
  are now merged and sorted before being added, instead of two unsorted
  passes (crashed whenever a fenced block preceded inline code in a note).
- Add explicit @codemirror/state and @codemirror/view devDependencies
  (previously only transitive via @codemirror/language).
- Add Reading View support for inline `date-calc:` spans via
  registerMarkdownPostProcessor (previously Live Preview only), mirroring
  the approach used by Dataview's inline queries.
- Fix verbose=false being silently truthy (non-empty string) in inline
  key=value config, which meant it never actually disabled verbose output.
- Fix diff type auto-inference: from/to was dead code (countdown's check
  always matched first); reordered so from+to or start+end infer diff.
- Implement documented but missing birthday label support: cfg.label,
  falling back to frontmatter name ("Jane's age:"), then "Age:".
- Split main.ts (777 lines) into src/ modules per AGENTS.md conventions.
- Fix duplicated command-palette prefixes, move inline JS styles to
  styles.css, fix package.json author, drop orphaned showArrow setting.

Verified: unit tests against the real bundled logic (mocked obsidian
module), a reproduction of the RangeSetBuilder crash against the real
@codemirror/state package, and live end-to-end testing in Obsidian via
CDP/Playwright (Tchernobyl vault).

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "date-calculator",
-	"version": "1.0.0",
+	"version": "1.1.0",
 	"description": "Calculate ages, countdowns, and date differences dynamically in your notes using inline code or fenced blocks.",
 	"main": "main.js",
 	"scripts": {
@@ -9,10 +9,12 @@
 		"version": "node version-bump.mjs && git add manifest.json versions.json"
 	},
 	"keywords": [],
-	"author": "",
+	"author": "Olivier Legendre",
 	"license": "MIT",
 	"devDependencies": {
 		"@codemirror/language": "^6.12.1",
+		"@codemirror/state": "^6.5.2",
+		"@codemirror/view": "^6.38.2",
 		"@lezer/common": "^1.5.0",
 		"@types/node": "^16.11.6",
 		"@typescript-eslint/eslint-plugin": "5.29.0",